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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.82 by root, Mon Nov 20 22:26:16 2006 UTC vs.
Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	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
		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)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
63	#define UCORO_STATE "_coro_state"	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
64		92
65	/* 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
66	* 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
67	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
69		98
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		100
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	101	#if __GNUC__ >= 3
		102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		104	#else
		105	# define attribute(x)
		106	# define BARRIER
		107	#endif
		108
		109	#define NOINLINE attribute ((noinline))
73		110
74	#include "CoroAPI.h"	111	#include "CoroAPI.h"
75		112
76	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
…		…
80	#else	117	#else
81	# define LOCK (void)0	118	# define LOCK (void)0
82	# define UNLOCK (void)0	119	# define UNLOCK (void)0
83	#endif	120	#endif
84		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;
85	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
86	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;
87	static HV *coro_state_stash;	135	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
91		137
92	/* this is actually not only the c stack but also c registers etc... */	138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
		141	/* this is a structure representing a c-level coroutine */
93	typedef struct {	142	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	143	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		144
		145	/* the stack */
		146	void *sptr;
		147	size_t ssize;
		148
		149	/* cpu state */
		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 */
		152	JMPENV *top_env;
98	coro_context cctx;	153	coro_context cctx;
99		154
100	void *sptr;	155	#if CORO_USE_VALGRIND
101	long ssize; /* positive == mmap, otherwise malloc */	156	int valgrind_id;
102	} coro_stack;	157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
103		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	};
		167
		168	/* this is a structure representing a perl-level coroutine */
104	struct coro {	169	struct coro {
105	/* the optional C context */	170	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	171	coro_cctx *cctx;
107	void *cursp;
108	int gencnt;
109
110	/* optionally saved, might be zero */
111	AV *defav;
112	SV *defsv;
113	SV *errsv;
114
115	/* saved global state not related to stacks */
116	U8 dowarn;
117	I32 in_eval;
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
121	AV *curstack;
122	AV *mainstack;
123	SV **stack_sp;
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148	JMPENV *top_env;
149		172
150	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
151	AV *args;	174	AV *args;
		175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
		178
		179	/* optionally saved, might be zero */
		180	AV *defav; /* @_ */
		181	SV *defsv; /* $_ */
		182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
		186
		187	#define VAR(name,type) type name;
		188	# include "state.h"
		189	#undef VAR
		190
		191	/* coro process data */
		192	int prio;
		193
		194	/* linked list */
		195	struct coro *next, *prev;
		196	HV *hv; /* the perl hash associated with this coro, if any */
152	};	197	};
153		198
154	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
156		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
157	static AV *	219	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
159	{	221	{
160	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
162		224
163	newpadlist = newAV ();	225	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	227	#if PERL_VERSION_ATLEAST (5,9,0)
		228	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		229	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	230	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	231	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	232	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	233	--AvFILLp (padlist);
172		234
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	235	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
217		279
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		281
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		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
222	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
223	static void	292	static void
224	get_padlist (pTHX_ CV *cv)	293	get_padlist (pTHX_ CV *cv)
225	{	294	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
227		297
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	300	else
231	{	301	{
232	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
233	/* this should work - but it doesn't :( */	303	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	304	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
238	#else	308	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
242	}	312	}
243		313
244	static void	314	static void
245	put_padlist (pTHX_ CV *cv)	315	put_padlist (pTHX_ CV *cv)
246	{	316	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
248		319
249	if (!mg)	320	if (!mg)
250	{	321	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
255	}	326	}
256		327
257	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);
258	}	334	}
		335
		336	/** load & save, init *******************************************************/
259		337
260	#define SB do {	338	#define SB do {
261	#define SE } while (0)	339	#define SE } while (0)
262		340
263	#define LOAD(state) load_state(aTHX_ (state));
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
265
266	#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
267		342
268	static void	343	static void
269	load_state(pTHX_ Coro__State c)	344	load_perl (pTHX_ Coro__State c)
270	{	345	{
271	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	347	# include "state.h"
273		348	#undef VAR
274	PL_curstackinfo = c->curstackinfo;
275	PL_curstack = c->curstack;
276	PL_mainstack = c->mainstack;
277	PL_stack_sp = c->stack_sp;
278	PL_op = c->op;
279	PL_curpad = c->curpad;
280	PL_comppad = c->comppad;
281	PL_compcv = c->compcv;
282	PL_stack_base = c->stack_base;
283	PL_stack_max = c->stack_max;
284	PL_tmps_stack = c->tmps_stack;
285	PL_tmps_floor = c->tmps_floor;
286	PL_tmps_ix = c->tmps_ix;
287	PL_tmps_max = c->tmps_max;
288	PL_markstack = c->markstack;
289	PL_markstack_ptr = c->markstack_ptr;
290	PL_markstack_max = c->markstack_max;
291	PL_scopestack = c->scopestack;
292	PL_scopestack_ix = c->scopestack_ix;
293	PL_scopestack_max = c->scopestack_max;
294	PL_savestack = c->savestack;
295	PL_savestack_ix = c->savestack_ix;
296	PL_savestack_max = c->savestack_max;
297	#if PERL_VERSION < 9
298	PL_retstack = c->retstack;
299	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;
301	#endif
302	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305		349
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	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	}
309		369
310	{	370	{
311	dSP;	371	dSP;
312	CV *cv;	372	CV *cv;
313		373
314	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
316	{	376	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
323	}	379	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	380	}
327		381
328	PUTBACK;	382	PUTBACK;
329	}	383	}
330	}	384	}
331		385
332	static void	386	static void
333	save_state(pTHX_ Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
334	{	388	{
335	{	389	{
336	dSP;	390	dSP;
337	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	395	/*
342	* 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
343	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
344	*/	398	*/
345		399
		400	EXTEND (SP, 3 + 1);
346	PUSHs (Nullsv);	401	PUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
348	for (;;)	403	for (;;)
349	{	404	{
350	while (cxix >= 0)	405	while (cxix >= 0)
351	{	406	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
353		408
354	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
355	{	410	{
356	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
		412
357	if (CvDEPTH(cv))	413	if (CvDEPTH (cv))
358	{	414	{
359	EXTEND (SP, CvDEPTH(cv)*2);	415	EXTEND (SP, 3);
360
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	416	PUSHs ((SV *)CvPADLIST (cv));
		417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
370		419
		420	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	421	get_padlist (aTHX_ cv);
372	}	422	}
373	}	423	}
374	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)
376	{
377	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}
381	#endif
382	}	424	}
383		425
384	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
385	break;	427	break;
386		428
…		…
390	}	432	}
391		433
392	PUTBACK;	434	PUTBACK;
393	}	435	}
394		436
395	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;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	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;
398		442
399	c->dowarn = PL_dowarn;	443	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	444	# include "state.h"
401		445	#undef VAR
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;
406	c->op = PL_op;
407	c->curpad = PL_curpad;
408	c->comppad = PL_comppad;
409	c->compcv = PL_compcv;
410	c->stack_base = PL_stack_base;
411	c->stack_max = PL_stack_max;
412	c->tmps_stack = PL_tmps_stack;
413	c->tmps_floor = PL_tmps_floor;
414	c->tmps_ix = PL_tmps_ix;
415	c->tmps_max = PL_tmps_max;
416	c->markstack = PL_markstack;
417	c->markstack_ptr = PL_markstack_ptr;
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	c->top_env = PL_top_env;
433	}	446	}
434		447
435	/*	448	/*
436	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
440	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
441	static void	457	static void
442	coro_init_stacks (pTHX)	458	coro_init_stacks (pTHX)
443	{	459	{
444	LOCK;
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
447	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		464
451	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
452	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
453	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454		468
455	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,128,SV*);
456	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
457	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
458	PL_tmps_max = 96;	472	PL_tmps_max = 128;
459		473
460	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,32,I32);
461	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
462	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 32;
463		477
464	#ifdef SET_MARK_OFFSET	478	#ifdef SET_MARK_OFFSET
465	SET_MARK_OFFSET;	479	SET_MARK_OFFSET;
466	#endif	480	#endif
467		481
468	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,32,I32);
469	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
470	PL_scopestack_max = 16;	484	PL_scopestack_max = 32;
471		485
472	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,64,ANY);
473	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	488	PL_savestack_max = 64;
475		489
476	#if PERL_VERSION < 9	490	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,16,OP*);
478	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	493	PL_retstack_max = 16;
480	#endif	494	#endif
481
482	UNLOCK;
483	}	495	}
		496	#endif
484		497
485	/*	498	/*
486	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
487	*/	500	*/
488	static void	501	static void
489	destroy_stacks(pTHX)	502	coro_destroy_stacks (pTHX)
490	{	503	{
491	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
492	{	505	{
493	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
494	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
495		509
496	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
497	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
498		513
		514	/* unwind all extra stacks */
499	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
500	}	519	}
501		520
502	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
503	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
504		523
505	while (PL_curstackinfo)	524	while (PL_curstackinfo)
506	{	525	{
507	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
508		527
509	{ /*D*//*remove*/
510	dSP;
511	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512	PUTBACK; /* possibly superfluous */
513	}
514
515	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
516	{
517	dounwind (-1);/*D*//*remove*/
518	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
519	}
520		530
521	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
522	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
523	PL_curstackinfo = p;	533	PL_curstackinfo = p;
524	}	534	}
525		535
526	Safefree (PL_tmps_stack);	536	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	537	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	538	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	539	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	540	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	541	Safefree (PL_retstack);
532	#endif	542	#endif
533	}	543	}
534		544
535	static void	545	/** coroutine stack handling ************************************************/
536	allocate_stack (Coro__State ctx, int alloc)
537	{
538	coro_stack *stack;
539		546
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{
548	#if HAVE_MMAP
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551	if (stack->sptr != (void *)-1)
552	{
553	# if STACKGUARD
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
555	# endif
556	}
557	else
558	#endif
559	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));
561	New (0, stack->sptr, STACKSIZE, long);
562	}
563	}
564	else
565	stack->sptr = 0;
566
567	ctx->stack = stack;
568	}
569
570	static void	547	static void
571	deallocate_stack (Coro__State ctx)	548	setup_coro (pTHX_ struct coro *coro)
572	{
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587
588	Safefree (stack);
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}
594
595	static void
596	setup_coro (void *arg)
597	{	549	{
598	/*	550	/*
599	* emulate part of the perl startup here.	551	* emulate part of the perl startup here.
600	*/	552	*/
		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;
		562
		563	{
		564	dSP;
		565	LOGOP myop;
		566
		567	SvREFCNT_dec (GvAV (PL_defgv));
		568	GvAV (PL_defgv) = coro->args; coro->args = 0;
		569
		570	Zero (&myop, 1, LOGOP);
		571	myop.op_next = Nullop;
		572	myop.op_flags = OPf_WANT_VOID;
		573
		574	PUSHMARK (SP);
		575	XPUSHs (av_shift (GvAV (PL_defgv)));
		576	PUTBACK;
		577	PL_op = (OP *)&myop;
		578	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		579	SPAGAIN;
		580	}
		581
		582	ENTER; /* necessary e.g. for dounwind */
		583	}
		584
		585	static void
		586	free_coro_mortal (pTHX)
		587	{
		588	if (coro_mortal)
		589	{
		590	SvREFCNT_dec (coro_mortal);
		591	coro_mortal = 0;
		592	}
		593	}
		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 */
		598	static void NOINLINE
		599	prepare_cctx (pTHX_ coro_cctx *cctx)
		600	{
		601	dSP;
		602	LOGOP myop;
		603
		604	Zero (&myop, 1, LOGOP);
		605	myop.op_next = PL_op;
		606	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		607
		608	PUSHMARK (SP);
		609	EXTEND (SP, 2);
		610	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		611	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		612	PUTBACK;
		613	PL_op = (OP *)&myop;
		614	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		615	SPAGAIN;
		616	}
		617
		618	/*
		619	* this is a _very_ stripped down perl interpreter ;)
		620	*/
		621	static void
		622	coro_run (void *arg)
		623	{
601	dTHX;	624	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605		625
606	coro_init_stacks (aTHX);	626	/* coro_run is the alternative tail of transfer(), so unlock here. */
607	/*PL_curcop = 0;*/	627	UNLOCK;
608	/*PL_in_eval = PL_in_eval;*/ /* inherit */
609	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
611		628
612	SPAGAIN;	629	PL_top_env = &PL_start_env;
613		630
614	if (ctx->stack)	631	/* inject a fake subroutine call to cctx_init */
615	{	632	prepare_cctx (aTHX_ (coro_cctx *)arg);
616	ctx->cursp = 0;
617		633
618	PUSHMARK(SP);	634	/* somebody or something will hit me for both perl_run and PL_restartop */
619	PUTBACK;	635	PL_restartop = PL_op;
620	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	636	perl_run (PL_curinterp);
621		637
622	if (SvTRUE (ERRSV))	638	/*
623	croak (NULL);	639	* If perl-run returns we assume exit() was being called or the coro
624	else	640	* fell off the end, which seems to be the only valid (non-bug)
625	croak ("FATAL: CCTXT coroutine returned!");	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
		644	*/
		645	PL_top_env = main_top_env;
		646	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		647	}
		648
		649	static coro_cctx *
		650	cctx_new ()
		651	{
		652	coro_cctx *cctx;
		653	void *stack_start;
		654	size_t stack_size;
		655
		656	++cctx_count;
		657
		658	Newz (0, cctx, 1, coro_cctx);
		659
		660	#if HAVE_MMAP
		661
		662	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		663	/* mmap supposedly does allocate-on-write for us */
		664	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		665
		666	if (cctx->sptr != (void *)-1)
		667	{
		668	# if CORO_STACKGUARD
		669	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		670	# endif
		671	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		672	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		673	cctx->mapped = 1;
626	}	674	}
627	else	675	else
628	{	676	#endif
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);
632	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;
634
635	PL_op = (OP *)&myop;
636
637	PUSHMARK(SP);
638	XPUSHs (sub_init);
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;
649
650	ENTER; /* necessary e.g. for dounwind */
651	}	677	{
652	}	678	cctx->ssize = coro_stacksize * (long)sizeof (long);
		679	New (0, cctx->sptr, coro_stacksize, long);
653		680
654	static void	681	if (!cctx->sptr)
655	continue_coro (void *arg)	682	{
656	{	683	perror ("FATAL: unable to allocate stack for coroutine");
657	/*	684	_exit (EXIT_FAILURE);
658	* this is a _very_ stripped down perl interpreter ;)	685	}
659	*/
660	dTHX;
661	Coro__State ctx = (Coro__State)arg;
662		686
663	PL_top_env = &PL_start_env;	687	stack_start = cctx->sptr;
		688	stack_size = cctx->ssize;
		689	}
664		690
665	ctx->cursp = 0;	691	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		692	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		693
		694	return cctx;
		695	}
		696
		697	static void
		698	cctx_destroy (coro_cctx *cctx)
		699	{
		700	if (!cctx)
		701	return;
		702
		703	--cctx_count;
		704
		705	#if CORO_USE_VALGRIND
		706	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		707	#endif
		708
		709	#if HAVE_MMAP
		710	if (cctx->mapped)
		711	munmap (cctx->sptr, cctx->ssize);
		712	else
		713	#endif
		714	Safefree (cctx->sptr);
		715
		716	Safefree (cctx);
		717	}
		718
		719	static coro_cctx *
		720	cctx_get (pTHX)
		721	{
		722	while (cctx_first)
		723	{
		724	coro_cctx *cctx = cctx_first;
		725	cctx_first = cctx->next;
		726	--cctx_idle;
		727
		728	if (cctx->ssize >= coro_stacksize)
		729	return cctx;
		730
		731	cctx_destroy (cctx);
		732	}
		733
666	PL_op = PL_op->op_next;	734	PL_op = PL_op->op_next;
667	CALLRUNOPS(aTHX);	735	return cctx_new ();
668
669	abort ();
670	}	736	}
671		737
672	static void	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);
		750	}
		751
		752	++cctx_idle;
		753	cctx->next = cctx_first;
		754	cctx_first = cctx;
		755	}
		756
		757	/** coroutine switching *****************************************************/
		758
		759	/* never call directly, always through the coro_state_transfer global variable */
		760	static void NOINLINE
673	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	761	transfer (pTHX_ struct coro *prev, struct coro *next)
674	{	762	{
675	dSTACKLEVEL;	763	dSTACKLEVEL;
676		764
		765	/* sometimes transfer is only called to set idle_sp */
		766	if (!next)
		767	{
		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	}
677	if (prev != next)	771	else if (prev != next)
678	{	772	{
679	/* has this coro been created yet? */	773	coro_cctx *prev__cctx;
680	if (next->mainstack)	774
		775	if (prev->flags & CF_NEW)
681	{	776	{
682	LOCK;	777	/* create a new empty context */
683	SAVE (prev, flags);	778	Newz (0, prev->cctx, 1, coro_cctx);
684	LOAD (next);	779	prev->cctx->inuse = 1;
685	UNLOCK;	780	prev->flags &= ~CF_NEW;
686		781	prev->flags |= CF_RUNNING;
687	/* mark this state as in-use */
688	next->mainstack = 0;
689	next->tmps_ix = -2;
690
691	/* stacklevel changed? if yes, grab the stack for us! */
692	if (flags & TRANSFER_SAVE_CCTXT)
693	{
694	if (!prev->stack)
695	allocate_stack (prev, 0);
696	else if (prev->cursp != stacklevel
697	&& prev->stack->usecnt > 1)
698	{
699	prev->gencnt = ++prev->stack->gencnt;
700	prev->stack->usecnt = 1;
701	}
702
703	/* has our stack been invalidated? */
704	if (next->stack && next->stack->gencnt != next->gencnt)
705	{
706	deallocate_stack (next);
707	allocate_stack (next, 1);
708	coro_create (&(next->stack->cctx),
709	continue_coro, (void *)next,
710	next->stack->sptr, labs (next->stack->ssize));
711	}
712
713	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
714	prev->cursp = stacklevel;
715	/* don't add any code here */
716	}
717	else
718	next->cursp = stacklevel;
719	}	782	}
720	else if (next->tmps_ix == -2)	783
721	croak ("tried to transfer to running coroutine");	784	/*TODO: must not croak here */
		785	if (!prev->flags & CF_RUNNING)
		786	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		787
		788	if (next->flags & CF_RUNNING)
		789	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		790
		791	if (next->flags & CF_DESTROYED)
		792	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		793
		794	prev->flags &= ~CF_RUNNING;
		795	next->flags |= CF_RUNNING;
		796
		797	LOCK;
		798
		799	if (next->flags & CF_NEW)
		800	{
		801	/* need to start coroutine */
		802	next->flags &= ~CF_NEW;
		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);
		809	}
722	else	810	else
723	{	811	{
724	LOCK;	812	/* coroutine already started */
725	SAVE (prev, -1); /* first get rid of the old state */	813	save_perl (aTHX_ prev);
726	UNLOCK;	814	load_perl (aTHX_ next);
727
728	/* create the coroutine for the first time */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733
734	/* the new coroutine starts with start_env again */
735	PL_top_env = &PL_start_env;
736
737	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
738	{
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}	815	}
765	}
766		816
767	LOCK;	817	prev__cctx = prev->cctx;
768	if (coro_mortal)	818
769	{	819	/* possibly "free" the cctx */
770	SvREFCNT_dec (coro_mortal);	820	if (prev__cctx->idle_sp == STACKLEVEL)
771	coro_mortal = 0;	821	{
772	}	822	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		823	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		824
		825	prev->cctx = 0;
		826
		827	cctx_put (prev__cctx);
		828	prev__cctx->inuse = 0;
		829	}
		830
		831	if (!next->cctx)
		832	{
		833	next->cctx = cctx_get (aTHX);
		834	assert (!next->cctx->inuse);
		835	next->cctx->inuse = 1;
		836	}
		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
		845	free_coro_mortal (aTHX);
773	UNLOCK;	846	UNLOCK;
		847	}
774	}	848	}
775		849
776	#define SV_CORO(sv,func) \	850	struct transfer_args
777	do { \	851	{
778	if (SvROK (sv)) \	852	struct coro *prev, *next;
779	sv = SvRV (sv); \	853	};
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		854
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	855	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
798		856
		857	/** high level stuff ********************************************************/
		858
799	static void	859	static int
		860	coro_state_destroy (pTHX_ struct coro *coro)
		861	{
		862	if (coro->flags & CF_DESTROYED)
		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 */
		877
		878	if (coro->mainstack && coro->mainstack != main_mainstack)
		879	{
		880	struct coro temp;
		881
		882	assert (!(coro->flags & CF_RUNNING));
		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
		893	coro_destroy_stacks (aTHX);
		894
		895	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		896
		897	coro->mainstack = 0;
		898	}
		899
		900	cctx_destroy (coro->cctx);
		901	SvREFCNT_dec (coro->args);
		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;
		908	}
		909
		910	static int
		911	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		912	{
		913	struct coro *coro = (struct coro *)mg->mg_ptr;
		914	mg->mg_ptr = 0;
		915
		916	coro->hv = 0;
		917
		918	if (--coro->refcnt < 0)
		919	{
		920	coro_state_destroy (aTHX_ coro);
		921	Safefree (coro);
		922	}
		923
		924	return 0;
		925	}
		926
		927	static int
		928	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		929	{
		930	struct coro *coro = (struct coro *)mg->mg_ptr;
		931
		932	++coro->refcnt;
		933
		934	return 0;
		935	}
		936
		937	static MGVTBL coro_state_vtbl = {
		938	0, 0, 0, 0,
		939	coro_state_free,
		940	0,
		941	#ifdef MGf_DUP
		942	coro_state_dup,
		943	#else
		944	# define MGf_DUP 0
		945	#endif
		946	};
		947
		948	static struct coro *
		949	SvSTATE_ (pTHX_ SV *coro)
		950	{
		951	HV *stash;
		952	MAGIC *mg;
		953
		954	if (SvROK (coro))
		955	coro = SvRV (coro);
		956
		957	stash = SvSTASH (coro);
		958	if (stash != coro_stash && stash != coro_state_stash)
		959	{
		960	/* very slow, but rare, check */
		961	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		962	croak ("Coro::State object required");
		963	}
		964
		965	mg = CORO_MAGIC (coro);
		966	return (struct coro *)mg->mg_ptr;
		967	}
		968
		969	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		970
		971	static void
		972	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		973	{
		974	ta->prev = SvSTATE (prev_sv);
		975	ta->next = SvSTATE (next_sv);
		976	}
		977
		978	static void
800	api_transfer(pTHX_ SV *prev, SV *next, int flags)	979	api_transfer (SV *prev_sv, SV *next_sv)
801	{	980	{
802	SV_CORO (prev, "Coro::transfer");	981	dTHX;
803	SV_CORO (next, "Coro::transfer");	982	struct transfer_args ta;
804		983
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	984	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		985	TRANSFER (ta);
		986	}
		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;
806	}	999	}
807		1000
808	/** Coro ********************************************************************/	1001	/** Coro ********************************************************************/
809		1002
810	#define PRIO_MAX 3
811	#define PRIO_HIGH 1
812	#define PRIO_NORMAL 0
813	#define PRIO_LOW -1
814	#define PRIO_IDLE -3
815	#define PRIO_MIN -4
816
817	/* for Coro.pm */
818	static GV *coro_current, *coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;
821
822	static void	1003	static void
823	coro_enq (pTHX_ SV *sv)	1004	coro_enq (pTHX_ SV *coro_sv)
824	{	1005	{
825	SV **xprio;
826	int prio;
827
828	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837
838	av_push (coro_ready [prio - PRIO_MIN], sv);	1006	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;
840	}	1007	}
841		1008
842	static SV *	1009	static SV *
843	coro_deq (pTHX_ int min_prio)	1010	coro_deq (pTHX_ int min_prio)
844	{	1011	{
…		…
847	min_prio -= PRIO_MIN;	1014	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	1015	if (min_prio < 0)
849	min_prio = 0;	1016	min_prio = 0;
850		1017
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1018	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (AvFILLp (coro_ready[prio]) >= 0)	1019	if (AvFILLp (coro_ready [prio]) >= 0)
853	{
854	coro_nready--;
855	return av_shift (coro_ready[prio]);	1020	return av_shift (coro_ready [prio]);
856	}
857		1021
858	return 0;	1022	return 0;
859	}	1023	}
860		1024
861	static void	1025	static int
862	api_ready (SV *coro)	1026	api_ready (SV *coro_sv)
863	{	1027	{
864	dTHX;	1028	dTHX;
		1029	struct coro *coro;
865		1030
866	if (SvROK (coro))	1031	if (SvROK (coro_sv))
867	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;
868		1040
869	LOCK;	1041	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	1042	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1043	++coro_nready;
871	UNLOCK;	1044	UNLOCK;
		1045
		1046	return 1;
		1047	}
		1048
		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
		1057	prepare_schedule (pTHX_ struct transfer_args *ta)
		1058	{
		1059	SV *prev_sv, *next_sv;
		1060
		1061	for (;;)
		1062	{
		1063	LOCK;
		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;
		1096	UNLOCK;
		1097	break;
		1098	}
		1099
		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
		1108	LOCK;
		1109	free_coro_mortal (aTHX);
		1110	coro_mortal = prev_sv;
		1111	UNLOCK;
		1112	}
		1113
		1114	static void
		1115	prepare_cede (pTHX_ struct transfer_args *ta)
		1116	{
		1117	api_ready (coro_current);
		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;
872	}	1133	}
873		1134
874	static void	1135	static void
875	api_schedule (void)	1136	api_schedule (void)
876	{	1137	{
877	dTHX;	1138	dTHX;
		1139	struct transfer_args ta;
878		1140
879	SV *prev, *next;	1141	prepare_schedule (aTHX_ &ta);
880		1142	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901	}	1143	}
902		1144
903	static void	1145	static int
904	api_cede (void)	1146	api_cede (void)
905	{	1147	{
906	dTHX;	1148	dTHX;
		1149	struct transfer_args ta;
907		1150
908	LOCK;	1151	prepare_cede (aTHX_ &ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;
911		1152
912	api_schedule ();	1153	if (ta.prev != ta.next)
		1154	{
		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;
913	}	1175	}
914		1176
915	MODULE = Coro::State PACKAGE = Coro::State	1177	MODULE = Coro::State PACKAGE = Coro::State
916		1178
917	PROTOTYPES: ENABLE	1179	PROTOTYPES: DISABLE
918		1180
919	BOOT:	1181	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1182	{
921	#ifdef USE_ITHREADS	1183	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1184	MUTEX_INIT (&coro_mutex);
923	#endif	1185	#endif
924	BOOT_PAGESIZE;	1186	BOOT_PAGESIZE;
925		1187
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1188	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1189
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1190	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1191	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
932	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));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1195	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1196	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
934		1197
935	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;
936		1203
937	coroapi.ver = CORO_API_VERSION;	1204	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1205	coroapi.transfer = api_transfer;
939	}
940		1206
941	Coro::State	1207	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1208	}
943	SV * args	1209
944	PROTOTYPE: $	1210	SV *
		1211	new (char *klass, ...)
945	CODE:	1212	CODE:
946	Coro__State coro;	1213	{
		1214	struct coro *coro;
		1215	HV *hv;
		1216	int i;
947		1217
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1218	Newz (0, coro, 1, struct coro);
		1219	coro->args = newAV ();
		1220	coro->save = CORO_SAVE_DEF;
		1221	coro->flags = CF_NEW;
952		1222
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1223	if (first) first->prev = coro;
954	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1224	coro->next = first;
955	/*coro->stack = 0;*/	1225	first = coro;
956		1226
957	RETVAL = coro;	1227	coro->hv = hv = newHV ();
		1228	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1229	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1230
		1231	for (i = 1; i < items; i++)
		1232	av_push (coro->args, newSVsv (ST (i)));
		1233	}
958	OUTPUT:	1234	OUTPUT:
959	RETVAL	1235	RETVAL
960		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:
		1253	RETVAL
		1254
961	void	1255	void
962	transfer(prev, next, flags)	1256	_set_stacklevel (...)
963	SV *prev	1257	ALIAS:
964	SV *next	1258	Coro::State::transfer = 1
965	int flags	1259	Coro::schedule = 2
966	PROTOTYPE: @	1260	Coro::cede = 3
		1261	Coro::cede_notself = 4
967	CODE:	1262	CODE:
968	PUTBACK;	1263	{
969	SV_CORO (next, "Coro::transfer");	1264	struct transfer_args ta;
970	SV_CORO (prev, "Coro::transfer");	1265
971	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1266	switch (ix)
972	SPAGAIN;	1267	{
		1268	case 0:
		1269	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1270	ta.next = 0;
		1271	break;
		1272
		1273	case 1:
		1274	if (items != 2)
		1275	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1276
		1277	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1278	break;
		1279
		1280	case 2:
		1281	prepare_schedule (aTHX_ &ta);
		1282	break;
		1283
		1284	case 3:
		1285	prepare_cede (aTHX_ &ta);
		1286	break;
		1287
		1288	case 4:
		1289	if (!prepare_cede_notself (aTHX_ &ta))
		1290	XSRETURN_EMPTY;
		1291
		1292	break;
		1293	}
		1294
		1295	BARRIER;
		1296	TRANSFER (ta);
		1297
		1298	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1299	XSRETURN_YES;
		1300	}
		1301
		1302	bool
		1303	_destroy (SV *coro_sv)
		1304	CODE:
		1305	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1306	OUTPUT:
		1307	RETVAL
973		1308
974	void	1309	void
975	DESTROY(coro)
976	Coro::State coro
977	CODE:
978
979	if (coro->mainstack && coro->mainstack != main_mainstack)
980	{
981	struct coro temp;
982
983	PUTBACK;
984	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
985	LOAD (aTHX_ coro);
986	SPAGAIN;
987
988	destroy_stacks (aTHX);
989
990	LOAD ((&temp)); /* this will get rid of defsv etc.. */
991	SPAGAIN;
992
993	coro->mainstack = 0;
994	}
995
996	deallocate_stack (coro);
997	SvREFCNT_dec (coro->args);
998	Safefree (coro);
999
1000	void
1001	_exit(code)	1310	_exit (code)
1002	int code	1311	int code
1003	PROTOTYPE: $	1312	PROTOTYPE: $
1004	CODE:	1313	CODE:
1005	_exit (code);	1314	_exit (code);
1006		1315
1007	MODULE = Coro::State PACKAGE = Coro::Cont	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
1008		1338
1009	void	1339	void
1010	yield(...)	1340	list ()
1011	PROTOTYPE: @	1341	PPCODE:
1012	CODE:	1342	{
1013	SV *yieldstack;	1343	struct coro *coro;
1014	SV *sv;	1344	for (coro = first; coro; coro = coro->next)
1015	AV *defav = GvAV (PL_defgv);	1345	if (coro->hv)
1016	struct coro *prev, *next;	1346	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1347	}
1017		1348
1018	yieldstack = *hv_fetch (	1349	void
1019	(HV *)SvRV (GvSV (coro_current)),	1350	_eval (SV *coro_sv, SV *coderef)
1020	"yieldstack", sizeof ("yieldstack") - 1,	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
1021	0	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	}
1022	);	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
1023		1400
1024	/* set up @_ -- ugly */
1025	av_clear (defav);
1026	av_fill (defav, items - 1);
1027	while (items--)
1028	av_store (defav, items, SvREFCNT_inc (ST(items)));
1029
1030	sv = av_pop ((AV *)SvRV (yieldstack));
1031	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1032	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1033	SvREFCNT_dec (sv);
1034
1035	transfer (aTHX_ prev, next, 0);
1036		1401
1037	MODULE = Coro::State PACKAGE = Coro	1402	MODULE = Coro::State PACKAGE = Coro
1038		1403
1039	BOOT:	1404	BOOT:
1040	{	1405	{
1041	int i;	1406	int i;
		1407
1042	HV *stash = gv_stashpv ("Coro", TRUE);	1408	coro_stash = gv_stashpv ("Coro", TRUE);
1043		1409
1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1410	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1411	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1412	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1413	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1414	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1415	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050		1416
1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1417	coro_current = get_sv ("Coro::current", FALSE);
1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1418	SvREADONLY_on (coro_current);
1053		1419
1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1420	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055	coro_ready[i] = newAV ();	1421	coro_ready[i] = newAV ();
1056		1422
1057	{	1423	{
1058	SV *sv = perl_get_sv("Coro::API", 1);	1424	SV *sv = perl_get_sv("Coro::API", 1);
1059		1425
1060	coroapi.schedule = api_schedule;	1426	coroapi.schedule = api_schedule;
		1427	coroapi.save = api_save;
1061	coroapi.cede = api_cede;	1428	coroapi.cede = api_cede;
		1429	coroapi.cede_notself = api_cede_notself;
1062	coroapi.ready = api_ready;	1430	coroapi.ready = api_ready;
		1431	coroapi.is_ready = api_is_ready;
1063	coroapi.nready = &coro_nready;	1432	coroapi.nready = &coro_nready;
1064	coroapi.current = coro_current;	1433	coroapi.current = coro_current;
1065		1434
1066	GCoroAPI = &coroapi;	1435	GCoroAPI = &coroapi;
1067	sv_setiv (sv, (IV)&coroapi);	1436	sv_setiv (sv, (IV)&coroapi);
1068	SvREADONLY_on (sv);	1437	SvREADONLY_on (sv);
1069	}	1438	}
1070	}	1439	}
1071		1440
1072	#if !PERL_MICRO
1073
1074	void	1441	void
1075	ready(self)	1442	_set_current (SV *current)
1076	SV * self
1077	PROTOTYPE: $	1443	PROTOTYPE: $
1078	CODE:	1444	CODE:
1079	api_ready (self);	1445	SvREFCNT_dec (SvRV (coro_current));
1080		1446	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1081	#endif
1082		1447
1083	int	1448	int
		1449	prio (Coro::State coro, int newprio = 0)
		1450	ALIAS:
		1451	nice = 1
		1452	CODE:
		1453	{
		1454	RETVAL = coro->prio;
		1455
		1456	if (items > 1)
		1457	{
		1458	if (ix)
		1459	newprio = coro->prio - newprio;
		1460
		1461	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1462	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1463
		1464	coro->prio = newprio;
		1465	}
		1466	}
		1467	OUTPUT:
		1468	RETVAL
		1469
		1470	SV *
		1471	ready (SV *self)
		1472	PROTOTYPE: $
		1473	CODE:
		1474	RETVAL = boolSV (api_ready (self));
		1475	OUTPUT:
		1476	RETVAL
		1477
		1478	int
1084	nready(...)	1479	nready (...)
1085	PROTOTYPE:	1480	PROTOTYPE:
1086	CODE:	1481	CODE:
1087	RETVAL = coro_nready;	1482	RETVAL = coro_nready;
1088	OUTPUT:	1483	OUTPUT:
1089	RETVAL	1484	RETVAL
1090		1485
1091	void	1486	MODULE = Coro::State PACKAGE = Coro::AIO
1092	schedule(...)	1487
1093	PROTOTYPE:	1488	SV *
		1489	_get_state ()
1094	CODE:	1490	CODE:
1095	api_schedule ();
1096
1097	void
1098	cede(...)
1099	PROTOTYPE:
1100	CODE:
1101	api_cede ();
1102
1103	# and these are hacks
1104	SV *
1105	_aio_get_state ()
1106	CODE:
1107	{	1491	{
1108	struct {	1492	struct io_state *data;
1109	int errorno;
1110	int laststype;
1111	int laststatval;
1112	Stat_t statcache;
1113	} data;
1114		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
1115	data.errorno = errno;	1499	data->errorno = errno;
1116	data.laststype = PL_laststype;	1500	data->laststype = PL_laststype;
1117	data.laststatval = PL_laststatval;	1501	data->laststatval = PL_laststatval;
1118	data.statcache = PL_statcache;	1502	data->statcache = PL_statcache;
1119
1120	RETVAL = newSVpvn ((char *)&data, sizeof data);
1121	}	1503	}
1122	OUTPUT:	1504	OUTPUT:
1123	RETVAL	1505	RETVAL
1124		1506
1125	void	1507	void
1126	_aio_set_state (char *data_)	1508	_set_state (char *data_)
1127	PROTOTYPE: $	1509	PROTOTYPE: $
1128	CODE:	1510	CODE:
1129	{	1511	{
1130	struct {	1512	struct io_state *data = (void *)data_;
1131	int errorno;
1132	int laststype;
1133	int laststatval;
1134	Stat_t statcache;
1135	} *data = (void *)data_;
1136		1513
1137	errno = data->errorno;	1514	errno = data->errorno;
1138	PL_laststype = data->laststype;	1515	PL_laststype = data->laststype;
1139	PL_laststatval = data->laststatval;	1516	PL_laststatval = data->laststatval;
1140	PL_statcache = data->statcache;	1517	PL_statcache = data->statcache;
1141	}	1518	}
		1519

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