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Comparing Coro/Coro/State.xs (file contents):
Revision 1.98 by root, Sun Nov 26 21:25:53 2006 UTC vs.
Revision 1.144 by root, Sun Mar 4 11:45:23 2007 UTC

…		…
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
9	#if PERL_VERSION < 6	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# endif
		22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if CORO_USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		39	#else
		40	# define REGISTER_STACK(cctx,start,end)
		41	#endif
		42
		43	/* the maximum number of idle cctx that will be pooled */
		44	#define MAX_IDLE_CCTX 8
		45
		46	#define PERL_VERSION_ATLEAST(a,b,c) \
		47	(PERL_REVISION > (a) \
		48	|| (PERL_REVISION == (a) \
		49	&& (PERL_VERSION > (b) \
		50	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		51
		52	#if !PERL_VERSION_ATLEAST (5,6,0)
10	# ifndef PL_ppaddr	53	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	54	# define PL_ppaddr ppaddr
12	# endif	55	# endif
13	# ifndef call_sv	56	# ifndef call_sv
14	# define call_sv perl_call_sv	57	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	68	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	69	# define IS_PADCONST(v) 0
27	# endif	70	# endif
28	#endif	71	#endif
29		72
30	#include <stdio.h>	73	/* 5.8.7 */
31	#include <errno.h>	74	#ifndef SvRV_set
		75	# define SvRV_set(s,v) SvRV(s) = (v)
		76	#endif
32		77
33	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
34	# undef STACKGUARD	79	# undef CORO_STACKGUARD
35	#endif
36
37	#ifndef STACKGUARD
38	# define STACKGUARD 0
39	#endif
40
41	#ifdef HAVE_MMAP
42	# include <unistd.h>
43	# include <sys/mman.h>
44	# ifndef MAP_ANONYMOUS
45	# ifdef MAP_ANON
46	# define MAP_ANONYMOUS MAP_ANON
47	# else
48	# undef HAVE_MMAP
49	# endif
50	# endif	80	#endif
51	# include <limits.h>	81
52	# ifndef PAGESIZE	82	#ifndef CORO_STACKGUARD
53	# define PAGESIZE pagesize	83	# define CORO_STACKGUARD 0
54	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55	static long pagesize;
56	# else
57	# define BOOT_PAGESIZE
58	# endif	84	#endif
		85
		86	/* prefer perl internal functions over our own? */
		87	#ifndef CORO_PREFER_PERL_FUNCTIONS
		88	# define CORO_PREFER_PERL_FUNCTIONS 0
59	#endif	89	#endif
60		90
61	/* The next macro should declare a variable stacklevel that contains and approximation	91	/* The next macro should declare a variable stacklevel that contains and approximation
62	* to the current C stack pointer. Its property is that it changes with each call	92	* to the current C stack pointer. Its property is that it changes with each call
63	* and should be unique. */	93	* and should be unique. */
64	#define dSTACKLEVEL int stacklevel	94	#define dSTACKLEVEL int stacklevel
65	#define STACKLEVEL ((void *)&stacklevel)	95	#define STACKLEVEL ((void *)&stacklevel)
66		96
67	#define IN_DESTRUCT (PL_main_cv == Nullcv)	97	#define IN_DESTRUCT (PL_main_cv == Nullcv)
68		98
		99	#if __GNUC__ >= 3
		100	# define attribute(x) __attribute__(x)
		101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		102	#else
		103	# define attribute(x)
		104	# define BARRIER
		105	#endif
		106
		107	#define NOINLINE attribute ((noinline))
		108
69	#include "CoroAPI.h"	109	#include "CoroAPI.h"
70
71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72		110
73	#ifdef USE_ITHREADS	111	#ifdef USE_ITHREADS
74	static perl_mutex coro_mutex;	112	static perl_mutex coro_mutex;
75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	113	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	114	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77	#else	115	#else
78	# define LOCK (void)0	116	# define LOCK (void)0
79	# define UNLOCK (void)0	117	# define UNLOCK (void)0
80	#endif	118	#endif
81		119
		120	/* helper storage struct for Coro::AIO */
		121	struct io_state
		122	{
		123	int errorno;
		124	I32 laststype;
		125	int laststatval;
		126	Stat_t statcache;
		127	};
		128
82	static struct CoroAPI coroapi;	129	static struct CoroAPI coroapi;
83	static AV *main_mainstack; /* used to differentiate between $main and others */	130	static AV *main_mainstack; /* used to differentiate between $main and others */
84	static HV *coro_state_stash, *coro_stash;	131	static HV *coro_state_stash, *coro_stash;
85	static SV *coro_mortal; /* will be freed after next transfer */	132	static SV *coro_mortal; /* will be freed after next transfer */
86		133
		134	static struct coro_cctx *cctx_first;
		135	static int cctx_count, cctx_idle;
		136
87	/* this is a structure representing a c-level coroutine */	137	/* this is a structure representing a c-level coroutine */
88	typedef struct coro_stack {	138	typedef struct coro_cctx {
89	struct coro_stack *next;	139	struct coro_cctx *next;
90		140
91	/* the stack */	141	/* the stack */
92	void *sptr;	142	void *sptr;
93	long ssize; /* positive == mmap, otherwise malloc */	143	ssize_t ssize; /* positive == mmap, otherwise malloc */
94		144
95	/* cpu state */	145	/* cpu state */
96	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	146	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		147	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
97	JMPENV *top_env;	148	JMPENV *top_env;
98	coro_context cctx;	149	coro_context cctx;
99	} coro_stack;	150
		151	int inuse;
		152
		153	#if CORO_USE_VALGRIND
		154	int valgrind_id;
		155	#endif
		156	} coro_cctx;
		157
		158	enum {
		159	CF_RUNNING = 0x0001, /* coroutine is running */
		160	CF_READY = 0x0002, /* coroutine is ready */
		161	CF_NEW = 0x0004, /* has never been switched to */
		162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		163	};
100		164
101	/* this is a structure representing a perl-level coroutine */	165	/* this is a structure representing a perl-level coroutine */
102	struct coro {	166	struct coro {
103	/* the c coroutine allocated to this perl coroutine, if any */	167	/* the c coroutine allocated to this perl coroutine, if any */
104	coro_stack *stack;	168	coro_cctx *cctx;
105		169
106	/* data associated with this coroutine (initial args) */	170	/* data associated with this coroutine (initial args) */
107	AV *args;	171	AV *args;
108	int refcnt;	172	int refcnt;
		173	int save; /* CORO_SAVE flags */
		174	int flags; /* CF_ flags */
109		175
110	/* optionally saved, might be zero */	176	/* optionally saved, might be zero */
111	AV *defav;	177	AV *defav; /* @_ */
112	SV *defsv;	178	SV *defsv; /* $_ */
113	SV *errsv;	179	SV *errsv; /* $@ */
		180	SV *irssv; /* $/ */
		181	SV *irssv_sv; /* real $/ cache */
114		182
115	/* saved global state not related to stacks */	183	#define VAR(name,type) type name;
116	U8 dowarn;	184	# include "state.h"
117	I32 in_eval;	185	#undef VAR
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		186
149	/* coro process data */	187	/* coro process data */
150	int prio;	188	int prio;
151	};	189	};
152		190
153	typedef struct coro *Coro__State;	191	typedef struct coro *Coro__State;
154	typedef struct coro *Coro__State_or_hashref;	192	typedef struct coro *Coro__State_or_hashref;
155		193
		194	/** Coro ********************************************************************/
		195
		196	#define PRIO_MAX 3
		197	#define PRIO_HIGH 1
		198	#define PRIO_NORMAL 0
		199	#define PRIO_LOW -1
		200	#define PRIO_IDLE -3
		201	#define PRIO_MIN -4
		202
		203	/* for Coro.pm */
		204	static SV *coro_current;
		205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		206	static int coro_nready;
		207
		208	/** lowlevel stuff **********************************************************/
		209
156	static AV *	210	static AV *
157	coro_clone_padlist (CV *cv)	211	coro_clone_padlist (CV *cv)
158	{	212	{
159	AV *padlist = CvPADLIST (cv);	213	AV *padlist = CvPADLIST (cv);
160	AV *newpadlist, *newpad;	214	AV *newpadlist, *newpad;
161		215
162	newpadlist = newAV ();	216	newpadlist = newAV ();
163	AvREAL_off (newpadlist);	217	AvREAL_off (newpadlist);
164	#if PERL_VERSION < 9	218	#if PERL_VERSION_ATLEAST (5,9,0)
		219	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		220	#else
165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	221	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168	#endif	222	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	223	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	224	--AvFILLp (padlist);
171		225
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	226	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
216		270
217	#define PERL_MAGIC_coro PERL_MAGIC_ext	271	#define PERL_MAGIC_coro PERL_MAGIC_ext
218		272
219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	273	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
220		274
		275	#define CORO_MAGIC(cv) \
		276	SvMAGIC (cv) \
		277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		278	? SvMAGIC (cv) \
		279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		280	: 0
		281
221	/* the next two functions merely cache the padlists */	282	/* the next two functions merely cache the padlists */
222	static void	283	static void
223	get_padlist (CV *cv)	284	get_padlist (CV *cv)
224	{	285	{
225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	286	MAGIC *mg = CORO_MAGIC (cv);
		287	AV *av;
226		288
227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229	else	291	else
230	{	292	{
231	#if 0	293	#if CORO_PREFER_PERL_FUNCTIONS
232	/* this is probably cleaner, but also slower? */	294	/* this is probably cleaner, but also slower? */
233	CV *cp = Perl_cv_clone (cv);	295	CV *cp = Perl_cv_clone (cv);
234	CvPADLIST (cv) = CvPADLIST (cp);	296	CvPADLIST (cv) = CvPADLIST (cp);
235	CvPADLIST (cp) = 0;	297	CvPADLIST (cp) = 0;
236	SvREFCNT_dec (cp);	298	SvREFCNT_dec (cp);
…		…
241	}	303	}
242		304
243	static void	305	static void
244	put_padlist (CV *cv)	306	put_padlist (CV *cv)
245	{	307	{
246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	308	MAGIC *mg = CORO_MAGIC (cv);
		309	AV *av;
247		310
248	if (!mg)	311	if (!mg)
249	{	312	{
250	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252	mg->mg_virtual = &vtbl_coro;	315	mg->mg_virtual = &vtbl_coro;
253	mg->mg_obj = (SV *)newAV ();	316	mg->mg_obj = (SV *)newAV ();
254	}	317	}
255		318
256	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	319	av = (AV *)mg->mg_obj;
		320
		321	if (AvFILLp (av) >= AvMAX (av))
		322	av_extend (av, AvMAX (av) + 1);
		323
		324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
257	}	325	}
		326
		327	/** load & save, init *******************************************************/
258		328
259	#define SB do {	329	#define SB do {
260	#define SE } while (0)	330	#define SE } while (0)
261		331
262	#define LOAD(state) load_state((state));
263	#define SAVE(state,flags) save_state((state),(flags));
264
265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
266		333
267	static void	334	static void
268	load_state(Coro__State c)	335	load_perl (Coro__State c)
269	{	336	{
270	PL_dowarn = c->dowarn;	337	#define VAR(name,type) PL_ ## name = c->name;
271	PL_in_eval = c->in_eval;	338	# include "state.h"
272		339	#undef VAR
273	PL_curstackinfo = c->curstackinfo;
274	PL_curstack = c->curstack;
275	PL_mainstack = c->mainstack;
276	PL_stack_sp = c->stack_sp;
277	PL_op = c->op;
278	PL_curpad = c->curpad;
279	PL_comppad = c->comppad;
280	PL_compcv = c->compcv;
281	PL_stack_base = c->stack_base;
282	PL_stack_max = c->stack_max;
283	PL_tmps_stack = c->tmps_stack;
284	PL_tmps_floor = c->tmps_floor;
285	PL_tmps_ix = c->tmps_ix;
286	PL_tmps_max = c->tmps_max;
287	PL_markstack = c->markstack;
288	PL_markstack_ptr = c->markstack_ptr;
289	PL_markstack_max = c->markstack_max;
290	PL_scopestack = c->scopestack;
291	PL_scopestack_ix = c->scopestack_ix;
292	PL_scopestack_max = c->scopestack_max;
293	PL_savestack = c->savestack;
294	PL_savestack_ix = c->savestack_ix;
295	PL_savestack_max = c->savestack_max;
296	#if PERL_VERSION < 9
297	PL_retstack = c->retstack;
298	PL_retstack_ix = c->retstack_ix;
299	PL_retstack_max = c->retstack_max;
300	#endif
301	PL_curpm = c->curpm;
302	PL_curcop = c->curcop;
303		340
304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		344	if (c->irssv)
		345	{
		346	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		347	SvREFCNT_dec (c->irssv);
		348	else
		349	{
		350	REPLACE_SV (PL_rs, c->irssv);
		351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		352	sv_setsv (c->irssv_sv, PL_rs);
		353	}
		354	}
307		355
308	{	356	{
309	dSP;	357	dSP;
310	CV *cv;	358	CV *cv;
311		359
312	/* now do the ugly restore mess */	360	/* now do the ugly restore mess */
313	while ((cv = (CV *)POPs))	361	while ((cv = (CV *)POPs))
314	{	362	{
315	AV *padlist = (AV *)POPs;
316
317	if (padlist)
318	{
319	put_padlist (cv); /* mark this padlist as available */	363	put_padlist (cv); /* mark this padlist as available */
320	CvPADLIST(cv) = padlist;	364	CvDEPTH (cv) = PTR2IV (POPs);
321	}	365	CvPADLIST (cv) = (AV *)POPs;
322
323	++CvDEPTH(cv);
324	}	366	}
325		367
326	PUTBACK;	368	PUTBACK;
327	}	369	}
		370	assert (!PL_comppad || AvARRAY (PL_comppad));//D
328	}	371	}
329		372
330	static void	373	static void
331	save_state(Coro__State c, int flags)	374	save_perl (Coro__State c)
332	{	375	{
		376	assert (!PL_comppad || AvARRAY (PL_comppad));//D
333	{	377	{
334	dSP;	378	dSP;
335	I32 cxix = cxstack_ix;	379	I32 cxix = cxstack_ix;
336	PERL_CONTEXT *ccstk = cxstack;	380	PERL_CONTEXT *ccstk = cxstack;
337	PERL_SI *top_si = PL_curstackinfo;	381	PERL_SI *top_si = PL_curstackinfo;
…		…
339	/*	383	/*
340	* the worst thing you can imagine happens first - we have to save	384	* the worst thing you can imagine happens first - we have to save
341	* (and reinitialize) all cv's in the whole callchain :(	385	* (and reinitialize) all cv's in the whole callchain :(
342	*/	386	*/
343		387
		388	EXTEND (SP, 3 + 1);
344	PUSHs (Nullsv);	389	PUSHs (Nullsv);
345	/* this loop was inspired by pp_caller */	390	/* this loop was inspired by pp_caller */
346	for (;;)	391	for (;;)
347	{	392	{
348	while (cxix >= 0)	393	while (cxix >= 0)
349	{	394	{
350	PERL_CONTEXT *cx = &ccstk[cxix--];	395	PERL_CONTEXT *cx = &ccstk[cxix--];
351		396
352	if (CxTYPE(cx) == CXt_SUB)	397	if (CxTYPE (cx) == CXt_SUB)
353	{	398	{
354	CV *cv = cx->blk_sub.cv;	399	CV *cv = cx->blk_sub.cv;
		400
355	if (CvDEPTH(cv))	401	if (CvDEPTH (cv))
356	{	402	{
357	EXTEND (SP, CvDEPTH(cv)*2);	403	EXTEND (SP, 3);
358
359	while (--CvDEPTH(cv))
360	{
361	/* this tells the restore code to increment CvDEPTH */
362	PUSHs (Nullsv);
363	PUSHs ((SV *)cv);
364	}
365
366	PUSHs ((SV *)CvPADLIST(cv));	404	PUSHs ((SV *)CvPADLIST (cv));
		405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
367	PUSHs ((SV *)cv);	406	PUSHs ((SV *)cv);
368		407
		408	CvDEPTH (cv) = 0;
369	get_padlist (cv);	409	get_padlist (cv);
370	}	410	}
371	}	411	}
372	#ifdef CXt_FORMAT
373	else if (CxTYPE(cx) == CXt_FORMAT)
374	{
375	/* I never used formats, so how should I know how these are implemented? */
376	/* my bold guess is as a simple, plain sub... */
377	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378	}
379	#endif
380	}	412	}
381		413
382	if (top_si->si_type == PERLSI_MAIN)	414	if (top_si->si_type == PERLSI_MAIN)
383	break;	415	break;
384		416
…		…
388	}	420	}
389		421
390	PUTBACK;	422	PUTBACK;
391	}	423	}
392		424
393	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	425	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
394	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
395	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
396		429
397	c->dowarn = PL_dowarn;	430	#define VAR(name,type)c->name = PL_ ## name;
398	c->in_eval = PL_in_eval;	431	# include "state.h"
399		432	#undef VAR
400	c->curstackinfo = PL_curstackinfo;
401	c->curstack = PL_curstack;
402	c->mainstack = PL_mainstack;
403	c->stack_sp = PL_stack_sp;
404	c->op = PL_op;
405	c->curpad = PL_curpad;
406	c->comppad = PL_comppad;
407	c->compcv = PL_compcv;
408	c->stack_base = PL_stack_base;
409	c->stack_max = PL_stack_max;
410	c->tmps_stack = PL_tmps_stack;
411	c->tmps_floor = PL_tmps_floor;
412	c->tmps_ix = PL_tmps_ix;
413	c->tmps_max = PL_tmps_max;
414	c->markstack = PL_markstack;
415	c->markstack_ptr = PL_markstack_ptr;
416	c->markstack_max = PL_markstack_max;
417	c->scopestack = PL_scopestack;
418	c->scopestack_ix = PL_scopestack_ix;
419	c->scopestack_max = PL_scopestack_max;
420	c->savestack = PL_savestack;
421	c->savestack_ix = PL_savestack_ix;
422	c->savestack_max = PL_savestack_max;
423	#if PERL_VERSION < 9
424	c->retstack = PL_retstack;
425	c->retstack_ix = PL_retstack_ix;
426	c->retstack_max = PL_retstack_max;
427	#endif
428	c->curpm = PL_curpm;
429	c->curcop = PL_curcop;
430	}	433	}
431		434
432	/*	435	/*
433	* allocate various perl stacks. This is an exact copy	436	* allocate various perl stacks. This is an exact copy
434	* of perl.c:init_stacks, except that it uses less memory	437	* of perl.c:init_stacks, except that it uses less memory
435	* on the (sometimes correct) assumption that coroutines do	438	* on the (sometimes correct) assumption that coroutines do
436	* not usually need a lot of stackspace.	439	* not usually need a lot of stackspace.
437	*/	440	*/
		441	#if CORO_PREFER_PERL_FUNCTIONS
		442	# define coro_init_stacks init_stacks
		443	#else
438	static void	444	static void
439	coro_init_stacks ()	445	coro_init_stacks ()
440	{	446	{
441	LOCK;
442
443	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
444	PL_curstackinfo->si_type = PERLSI_MAIN;	448	PL_curstackinfo->si_type = PERLSI_MAIN;
445	PL_curstack = PL_curstackinfo->si_stack;	449	PL_curstack = PL_curstackinfo->si_stack;
446	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
447		451
448	PL_stack_base = AvARRAY(PL_curstack);	452	PL_stack_base = AvARRAY(PL_curstack);
449	PL_stack_sp = PL_stack_base;	453	PL_stack_sp = PL_stack_base;
450	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
451		455
452	New(50,PL_tmps_stack,96,SV*);	456	New(50,PL_tmps_stack,128,SV*);
453	PL_tmps_floor = -1;	457	PL_tmps_floor = -1;
454	PL_tmps_ix = -1;	458	PL_tmps_ix = -1;
455	PL_tmps_max = 96;	459	PL_tmps_max = 128;
456		460
457	New(54,PL_markstack,16,I32);	461	New(54,PL_markstack,32,I32);
458	PL_markstack_ptr = PL_markstack;	462	PL_markstack_ptr = PL_markstack;
459	PL_markstack_max = PL_markstack + 16;	463	PL_markstack_max = PL_markstack + 32;
460		464
461	#ifdef SET_MARK_OFFSET	465	#ifdef SET_MARK_OFFSET
462	SET_MARK_OFFSET;	466	SET_MARK_OFFSET;
463	#endif	467	#endif
464		468
465	New(54,PL_scopestack,16,I32);	469	New(54,PL_scopestack,32,I32);
466	PL_scopestack_ix = 0;	470	PL_scopestack_ix = 0;
467	PL_scopestack_max = 16;	471	PL_scopestack_max = 32;
468		472
469	New(54,PL_savestack,96,ANY);	473	New(54,PL_savestack,64,ANY);
470	PL_savestack_ix = 0;	474	PL_savestack_ix = 0;
471	PL_savestack_max = 96;	475	PL_savestack_max = 64;
472		476
473	#if PERL_VERSION < 9	477	#if !PERL_VERSION_ATLEAST (5,9,0)
474	New(54,PL_retstack,8,OP*);	478	New(54,PL_retstack,16,OP*);
475	PL_retstack_ix = 0;	479	PL_retstack_ix = 0;
476	PL_retstack_max = 8;	480	PL_retstack_max = 16;
477	#endif	481	#endif
478
479	UNLOCK;
480	}	482	}
		483	#endif
481		484
482	/*	485	/*
483	* destroy the stacks, the callchain etc...	486	* destroy the stacks, the callchain etc...
484	*/	487	*/
485	static void	488	static void
486	destroy_stacks()	489	coro_destroy_stacks ()
487	{	490	{
488	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
489	{	492	{
490	/* is this ugly, I ask? */	493	/* restore all saved variables and stuff */
491	LEAVE_SCOPE (0);	494	LEAVE_SCOPE (0);
		495	assert (PL_tmps_floor == -1);
492		496
493	/* sure it is, but more important: is it correct?? :/ */	497	/* free all temporaries */
494	FREETMPS;	498	FREETMPS;
		499	assert (PL_tmps_ix == -1);
495		500
		501	/* unwind all extra stacks */
496	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	502	POPSTACK_TO (PL_mainstack);
		503
		504	/* unwind main stack */
		505	dounwind (-1);
497	}	506	}
498		507
499	while (PL_curstackinfo->si_next)	508	while (PL_curstackinfo->si_next)
500	PL_curstackinfo = PL_curstackinfo->si_next;	509	PL_curstackinfo = PL_curstackinfo->si_next;
501		510
502	while (PL_curstackinfo)	511	while (PL_curstackinfo)
503	{	512	{
504	PERL_SI *p = PL_curstackinfo->si_prev;	513	PERL_SI *p = PL_curstackinfo->si_prev;
505		514
506	{ /*D*//*remove*/
507	dSP;
508	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
509	PUTBACK; /* possibly superfluous */
510	}
511
512	if (!IN_DESTRUCT)	515	if (!IN_DESTRUCT)
513	{
514	dounwind (-1);/*D*//*remove*/
515	SvREFCNT_dec (PL_curstackinfo->si_stack);	516	SvREFCNT_dec (PL_curstackinfo->si_stack);
516	}
517		517
518	Safefree (PL_curstackinfo->si_cxstack);	518	Safefree (PL_curstackinfo->si_cxstack);
519	Safefree (PL_curstackinfo);	519	Safefree (PL_curstackinfo);
520	PL_curstackinfo = p;	520	PL_curstackinfo = p;
521	}	521	}
522		522
523	Safefree (PL_tmps_stack);	523	Safefree (PL_tmps_stack);
524	Safefree (PL_markstack);	524	Safefree (PL_markstack);
525	Safefree (PL_scopestack);	525	Safefree (PL_scopestack);
526	Safefree (PL_savestack);	526	Safefree (PL_savestack);
527	#if PERL_VERSION < 9	527	#if !PERL_VERSION_ATLEAST (5,9,0)
528	Safefree (PL_retstack);	528	Safefree (PL_retstack);
529	#endif	529	#endif
530	}	530	}
		531
		532	/** coroutine stack handling ************************************************/
531		533
532	static void	534	static void
533	setup_coro (struct coro *coro)	535	setup_coro (struct coro *coro)
534	{	536	{
535	/*	537	/*
536	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
537	*/	539	*/
538	dTHX;	540
		541	coro_init_stacks ();
		542
		543	PL_curcop = &PL_compiling;
		544	PL_in_eval = EVAL_NULL;
		545	PL_comppad = 0;
		546	PL_curpm = 0;
		547	PL_localizing = 0;
		548	PL_dirty = 0;
		549	PL_restartop = 0;
		550
		551	{
		552	dSP;
		553	LOGOP myop;
		554
		555	SvREFCNT_dec (GvAV (PL_defgv));
		556	GvAV (PL_defgv) = coro->args; coro->args = 0;
		557
		558	Zero (&myop, 1, LOGOP);
		559	myop.op_next = Nullop;
		560	myop.op_flags = OPf_WANT_VOID;
		561
		562	PUSHMARK (SP);
		563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		564	PUTBACK;
		565	PL_op = (OP *)&myop;
		566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		567	SPAGAIN;
		568	}
		569
		570	ENTER; /* necessary e.g. for dounwind */
		571	}
		572
		573	static void
		574	free_coro_mortal ()
		575	{
		576	if (coro_mortal)
		577	{
		578	SvREFCNT_dec (coro_mortal);
		579	coro_mortal = 0;
		580	}
		581	}
		582
		583	/* inject a fake call to Coro::State::_cctx_init into the execution */
		584	static void NOINLINE
		585	prepare_cctx (coro_cctx *cctx)
		586	{
539	dSP;	587	dSP;
540	UNOP myop;	588	LOGOP myop;
541	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
542		589
543	coro_init_stacks ();
544	/*PL_curcop = 0;*/
545	/*PL_in_eval = PL_in_eval;*/ /* inherit */
546	SvREFCNT_dec (GvAV (PL_defgv));
547	GvAV (PL_defgv) = coro->args; coro->args = 0;
548
549	SPAGAIN;
550
551	Zero (&myop, 1, UNOP);	590	Zero (&myop, 1, LOGOP);
552	myop.op_next = Nullop;	591	myop.op_next = PL_op;
553	myop.op_flags = OPf_WANT_VOID;	592	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
554		593
		594	PUSHMARK (SP);
		595	EXTEND (SP, 2);
		596	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		597	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		598	PUTBACK;
555	PL_op = (OP *)&myop;	599	PL_op = (OP *)&myop;
556
557	PUSHMARK(SP);
558	XPUSHs (sub_init);
559	PUTBACK;
560	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561	SPAGAIN;	601	SPAGAIN;
562
563	ENTER; /* necessary e.g. for dounwind */
564	}
565
566	static void
567	free_coro_mortal ()
568	{
569	if (coro_mortal)
570	{
571	SvREFCNT_dec (coro_mortal);
572	coro_mortal = 0;
573	}
574	}	602	}
575		603
576	static void	604	static void
577	coro_run (void *arg)	605	coro_run (void *arg)
578	{	606	{
		607	/* coro_run is the alternative tail of transfer(), so unlock here. */
		608	UNLOCK;
		609
579	/*	610	/*
580	* this is a _very_ stripped down perl interpreter ;)	611	* this is a _very_ stripped down perl interpreter ;)
581	*/	612	*/
582	dTHX;
583	int ret;
584
585	UNLOCK;
586
587	PL_top_env = &PL_start_env;	613	PL_top_env = &PL_start_env;
588		614
589	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));	615	/* inject call to cctx_init */
590	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));	616	prepare_cctx ((coro_cctx *)arg);
591
592	/* continue at cctx_init, without entersub */
593	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
594		617
595	/* somebody will hit me for both perl_run and PL_restartop */	618	/* somebody will hit me for both perl_run and PL_restartop */
596	ret = perl_run (PERL_GET_CONTEXT);	619	PL_restartop = PL_op;
597	printf ("ret %d\n", ret);//D	620	perl_run (PL_curinterp);
598		621
599	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);	622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
600	abort ();	623	abort ();
601	}	624	}
602		625
603	static coro_stack *	626	static coro_cctx *
604	stack_new ()	627	cctx_new ()
605	{	628	{
606	coro_stack *stack;	629	coro_cctx *cctx;
607		630
		631	++cctx_count;
		632
608	New (0, stack, 1, coro_stack);	633	Newz (0, cctx, 1, coro_cctx);
609		634
610	#if HAVE_MMAP	635	#if HAVE_MMAP
611		636
612	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	637	cctx->ssize = ((CORO_STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
613	/* mmap suppsedly does allocate-on-write for us */	638	/* mmap supposedly does allocate-on-write for us */
614	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	639	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
615		640
616	if (stack->sptr == (void *)-1)	641	if (cctx->sptr != (void *)-1)
617	{
618	perror ("FATAL: unable to mmap stack for coroutine");
619	_exit (EXIT_FAILURE);
620	}	642	{
621
622	# if STACKGUARD	643	# if CORO_STACKGUARD
623	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	644	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
624	# endif	645	# endif
		646	REGISTER_STACK (
		647	cctx,
		648	CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		649	cctx->ssize + (char *)cctx->sptr
		650	);
625		651
626	#else	652	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
627		653	}
		654	else
		655	#endif
		656	{
628	stack->ssize = STACKSIZE * (long)sizeof (long);	657	cctx->ssize = -CORO_STACKSIZE * (long)sizeof (long);
629	New (0, stack->sptr, STACKSIZE, long);	658	New (0, cctx->sptr, CORO_STACKSIZE, long);
630		659
631	if (!stack->sptr)	660	if (!cctx->sptr)
632	{	661	{
633	perror (stderr, "FATAL: unable to malloc stack for coroutine");	662	perror ("FATAL: unable to allocate stack for coroutine");
634	_exit (EXIT_FAILURE);	663	_exit (EXIT_FAILURE);
635	}	664	}
636		665
637	#endif	666	REGISTER_STACK (
		667	cctx,
		668	(char *)cctx->sptr,
		669	(char *)cctx->sptr - cctx->ssize
		670	);
638		671
639	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	672	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
		673	}
640		674
641	return stack;	675	return cctx;
642	}	676	}
643		677
644	static void	678	static void
645	stack_free (coro_stack *stack)	679	cctx_destroy (coro_cctx *cctx)
646	{	680	{
647	if (!stack)	681	if (!cctx)
648	return;	682	return;
649		683
		684	--cctx_count;
		685
		686	#if CORO_USE_VALGRIND
		687	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		688	#endif
		689
650	#if HAVE_MMAP	690	#if HAVE_MMAP
		691	if (cctx->ssize > 0)
651	munmap (stack->sptr, stack->ssize);	692	munmap (cctx->sptr, cctx->ssize);
652	#else	693	else
		694	#endif
653	Safefree (stack->sptr);	695	Safefree (cctx->sptr);
654	#endif
655		696
656	Safefree (stack);	697	Safefree (cctx);
657	}	698	}
658		699
659	static coro_stack *stack_first;
660
661	static coro_stack *	700	static coro_cctx *
662	stack_get ()	701	cctx_get ()
663	{	702	{
664	coro_stack *stack;	703	coro_cctx *cctx;
665		704
666	if (stack_first)	705	if (cctx_first)
667	{	706	{
668	stack = stack_first;	707	cctx = cctx_first;
669	stack_first = stack->next;	708	cctx_first = cctx->next;
		709	--cctx_idle;
670	}	710	}
671	else	711	else
672	{	712	{
673	stack = stack_new ();	713	cctx = cctx_new ();
674	PL_op = PL_op->op_next;	714	PL_op = PL_op->op_next;
675	}	715	}
676		716
677	return stack;	717	return cctx;
678	}	718	}
679		719
680	static void	720	static void
681	stack_put (coro_stack *stack)	721	cctx_put (coro_cctx *cctx)
682	{	722	{
683	stack->next = stack_first;	723	/* free another cctx if overlimit */
684	stack_first = stack;	724	if (cctx_idle >= MAX_IDLE_CCTX)
		725	{
		726	coro_cctx *first = cctx_first;
		727	cctx_first = first->next;
		728	--cctx_idle;
		729
		730	assert (!first->inuse);
		731	cctx_destroy (first);
		732	}
		733
		734	++cctx_idle;
		735	cctx->next = cctx_first;
		736	cctx_first = cctx;
685	}	737	}
		738
		739	/** coroutine switching *****************************************************/
686		740
687	/* never call directly, always through the coro_state_transfer global variable */	741	/* never call directly, always through the coro_state_transfer global variable */
688	static void	742	static void NOINLINE
689	transfer_impl (struct coro *prev, struct coro *next, int flags)	743	transfer (struct coro *prev, struct coro *next)
690	{	744	{
691	dSTACKLEVEL;	745	dSTACKLEVEL;
692		746
693	/* sometimes transfer is only called to set idle_sp */	747	/* sometimes transfer is only called to set idle_sp */
694	if (flags == TRANSFER_SET_STACKLEVEL)	748	if (!next)
		749	{
695	((coro_stack *)prev)->idle_sp = STACKLEVEL;	750	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		751	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		752	}
696	else if (prev != next)	753	else if (prev != next)
697	{	754	{
698	coro_stack *prev__stack;	755	coro_cctx *prev__cctx;
		756
		757	if (prev->flags & CF_NEW)
		758	{
		759	/* create a new empty context */
		760	Newz (0, prev->cctx, 1, coro_cctx);
		761	prev->cctx->inuse = 1;
		762	prev->flags &= ~CF_NEW;
		763	prev->flags |= CF_RUNNING;
		764	}
		765
		766	/*TODO: must not croak here */
		767	if (!prev->flags & CF_RUNNING)
		768	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		769
		770	if (next->flags & CF_RUNNING)
		771	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		772
		773	if (next->flags & CF_DESTROYED)
		774	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		775
		776	prev->flags &= ~CF_RUNNING;
		777	next->flags |= CF_RUNNING;
699		778
700	LOCK;	779	LOCK;
701		780
702	if (next->mainstack)	781	if (next->flags & CF_NEW)
703	{	782	{
704	/* coroutine already started */	783	/* need to start coroutine */
705	SAVE (prev, flags);	784	next->flags &= ~CF_NEW;
706	LOAD (next);	785	/* first get rid of the old state */
		786	save_perl (prev);
		787	/* setup coroutine call */
		788	setup_coro (next);
		789	/* need a new stack */
		790	assert (!next->cctx);
707	}	791	}
708	else	792	else
709	{	793	{
710	/* need to start coroutine */	794	/* coroutine already started */
711	/* first get rid of the old state */	795	save_perl (prev);
712	SAVE (prev, -1);	796	load_perl (next);
713	/* setup coroutine call */
714	setup_coro (next);
715	/* need a stack */
716	next->stack = 0;
717	}	797	}
718		798
719	if (!prev->stack)
720	/* create a new empty context */
721	Newz (0, prev->stack, 1, coro_stack);
722
723	prev__stack = prev->stack;	799	prev__cctx = prev->cctx;
724		800
725	/* possibly "free" the stack */	801	/* possibly "free" the cctx */
726	if (prev__stack->idle_sp == STACKLEVEL)	802	if (prev__cctx->idle_sp == STACKLEVEL)
727	{	803	{
728	stack_put (prev__stack);	804	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		805	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		806
729	prev->stack = 0;	807	prev->cctx = 0;
		808
		809	cctx_put (prev__cctx);
		810	prev__cctx->inuse = 0;
730	}	811	}
731		812
732	if (!next->stack)	813	if (!next->cctx)
733	next->stack = stack_get ();
734
735	if (prev__stack != next->stack)
736	{	814	{
737	prev__stack->top_env = PL_top_env;	815	next->cctx = cctx_get ();
738	PL_top_env = next->stack->top_env;	816	assert (!next->cctx->inuse);
739	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	817	next->cctx->inuse = 1;
740	}	818	}
741		819
		820	if (prev__cctx != next->cctx)
		821	{
		822	prev__cctx->top_env = PL_top_env;
		823	PL_top_env = next->cctx->top_env;
		824	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		825	}
		826
742	free_coro_mortal ();	827	free_coro_mortal ();
743
744	UNLOCK;	828	UNLOCK;
745	}	829	}
746	}	830	}
747		831
748	/* use this function pointer to call the above function */
749	/* this is done to increase chances of the compiler not inlining the call */
750	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
751	void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
752
753	struct transfer_args	832	struct transfer_args
754	{	833	{
755	struct coro *prev, *next;	834	struct coro *prev, *next;
756	int flags;
757	};	835	};
758		836
759	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	837	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
760		838
		839	/** high level stuff ********************************************************/
		840
761	static void	841	static int
762	coro_state_destroy (struct coro *coro)	842	coro_state_destroy (struct coro *coro)
763	{	843	{
764	if (coro->refcnt--)	844	if (coro->flags & CF_DESTROYED)
765	return;	845	return 0;
		846
		847	coro->flags |= CF_DESTROYED;
		848
		849	if (coro->flags & CF_READY)
		850	{
		851	/* reduce nready, as destroying a ready coro effectively unreadies it */
		852	/* alternative: look through all ready queues and remove the coro */
		853	LOCK;
		854	--coro_nready;
		855	UNLOCK;
		856	}
		857	else
		858	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
766		859
767	if (coro->mainstack && coro->mainstack != main_mainstack)	860	if (coro->mainstack && coro->mainstack != main_mainstack)
768	{	861	{
769	struct coro temp;	862	struct coro temp;
770		863
771	SAVE ((&temp), TRANSFER_SAVE_ALL);	864	assert (!(coro->flags & CF_RUNNING));
772	LOAD (coro);
773		865
		866	Zero (&temp, 1, struct coro);
		867	temp.save = CORO_SAVE_ALL;
		868
		869	if (coro->flags & CF_RUNNING)
		870	croak ("FATAL: tried to destroy currently running coroutine");
		871
		872	save_perl (&temp);
		873	load_perl (coro);
		874
774	destroy_stacks ();	875	coro_destroy_stacks ();
775		876
776	LOAD ((&temp)); /* this will get rid of defsv etc.. */	877	load_perl (&temp); /* this will get rid of defsv etc.. */
777		878
778	coro->mainstack = 0;	879	coro->mainstack = 0;
779	}	880	}
780		881
781	stack_free (coro->stack);	882	cctx_destroy (coro->cctx);
782	SvREFCNT_dec (coro->args);	883	SvREFCNT_dec (coro->args);
783	Safefree (coro);	884
		885	return 1;
784	}	886	}
785		887
786	static int	888	static int
787	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	889	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
788	{	890	{
789	struct coro *coro = (struct coro *)mg->mg_ptr;	891	struct coro *coro = (struct coro *)mg->mg_ptr;
790	mg->mg_ptr = 0;	892	mg->mg_ptr = 0;
791		893
		894	if (--coro->refcnt < 0)
		895	{
792	coro_state_destroy (coro);	896	coro_state_destroy (coro);
		897	Safefree (coro);
		898	}
793		899
794	return 0;	900	return 0;
795	}	901	}
796		902
797	static int	903	static int
…		…
802	++coro->refcnt;	908	++coro->refcnt;
803		909
804	return 0;	910	return 0;
805	}	911	}
806		912
807	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	913	static MGVTBL coro_state_vtbl = {
		914	0, 0, 0, 0,
		915	coro_state_free,
		916	0,
		917	#ifdef MGf_DUP
		918	coro_state_dup,
		919	#else
		920	# define MGf_DUP 0
		921	#endif
		922	};
808		923
809	static struct coro *	924	static struct coro *
810	SvSTATE (SV *coro)	925	SvSTATE (SV *coro)
811	{	926	{
812	HV *stash;	927	HV *stash;
…		…
821	/* very slow, but rare, check */	936	/* very slow, but rare, check */
822	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	937	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
823	croak ("Coro::State object required");	938	croak ("Coro::State object required");
824	}	939	}
825		940
826	mg = SvMAGIC (coro);	941	mg = CORO_MAGIC (coro);
827	assert (mg->mg_type == PERL_MAGIC_ext);
828	return (struct coro *)mg->mg_ptr;	942	return (struct coro *)mg->mg_ptr;
829	}	943	}
830		944
831	static void	945	static void
832	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	946	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
833	{	947	{
834	ta->prev = SvSTATE (prev);	948	ta->prev = SvSTATE (prev_sv);
835	ta->next = SvSTATE (next);	949	ta->next = SvSTATE (next_sv);
836	ta->flags = flags;
837	}	950	}
838		951
839	static void	952	static void
840	api_transfer (SV *prev, SV *next, int flags)	953	api_transfer (SV *prev_sv, SV *next_sv)
841	{	954	{
842	dTHX;
843	struct transfer_args ta;	955	struct transfer_args ta;
844		956
845	prepare_transfer (&ta, prev, next, flags);	957	prepare_transfer (&ta, prev_sv, next_sv);
846	TRANSFER (ta);	958	TRANSFER (ta);
847	}	959	}
848		960
		961	static int
		962	api_save (SV *coro_sv, int new_save)
		963	{
		964	struct coro *coro = SvSTATE (coro_sv);
		965	int old_save = coro->save;
		966
		967	if (new_save >= 0)
		968	coro->save = new_save;
		969
		970	return old_save;
		971	}
		972
849	/** Coro ********************************************************************/	973	/** Coro ********************************************************************/
850		974
851	#define PRIO_MAX 3
852	#define PRIO_HIGH 1
853	#define PRIO_NORMAL 0
854	#define PRIO_LOW -1
855	#define PRIO_IDLE -3
856	#define PRIO_MIN -4
857
858	/* for Coro.pm */
859	static GV *coro_current, *coro_idle;
860	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
861	static int coro_nready;
862
863	static void	975	static void
864	coro_enq (SV *sv)	976	coro_enq (SV *coro_sv)
865	{	977	{
866	int prio;
867
868	if (SvTYPE (sv) != SVt_PVHV)
869	croak ("Coro::ready tried to enqueue something that is not a coroutine");
870
871	prio = SvSTATE (sv)->prio;
872
873	av_push (coro_ready [prio - PRIO_MIN], sv);	978	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
874	coro_nready++;
875	}	979	}
876		980
877	static SV *	981	static SV *
878	coro_deq (int min_prio)	982	coro_deq (int min_prio)
879	{	983	{
…		…
883	if (min_prio < 0)	987	if (min_prio < 0)
884	min_prio = 0;	988	min_prio = 0;
885		989
886	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	990	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
887	if (AvFILLp (coro_ready [prio]) >= 0)	991	if (AvFILLp (coro_ready [prio]) >= 0)
888	{
889	coro_nready--;
890	return av_shift (coro_ready [prio]);	992	return av_shift (coro_ready [prio]);
891	}
892		993
893	return 0;	994	return 0;
894	}	995	}
895		996
896	static void	997	static int
897	api_ready (SV *coro)	998	api_ready (SV *coro_sv)
898	{	999	{
899	dTHX;	1000	struct coro *coro;
900		1001
901	if (SvROK (coro))	1002	if (SvROK (coro_sv))
902	coro = SvRV (coro);	1003	coro_sv = SvRV (coro_sv);
		1004
		1005	coro = SvSTATE (coro_sv);
		1006
		1007	if (coro->flags & CF_READY)
		1008	return 0;
		1009
		1010	coro->flags |= CF_READY;
903		1011
904	LOCK;	1012	LOCK;
905	coro_enq (SvREFCNT_inc (coro));	1013	coro_enq (SvREFCNT_inc (coro_sv));
		1014	++coro_nready;
906	UNLOCK;	1015	UNLOCK;
		1016
		1017	return 1;
		1018	}
		1019
		1020	static int
		1021	api_is_ready (SV *coro_sv)
		1022	{
		1023	return !!(SvSTATE (coro_sv)->flags & CF_READY);
907	}	1024	}
908		1025
909	static void	1026	static void
910	prepare_schedule (struct transfer_args *ta)	1027	prepare_schedule (struct transfer_args *ta)
911	{	1028	{
912	SV *current, *prev, *next;	1029	SV *prev_sv, *next_sv;
		1030
		1031	for (;;)
		1032	{
		1033	LOCK;
		1034	next_sv = coro_deq (PRIO_MIN);
		1035
		1036	/* nothing to schedule: call the idle handler */
		1037	if (!next_sv)
		1038	{
		1039	dSP;
		1040	UNLOCK;
		1041
		1042	ENTER;
		1043	SAVETMPS;
		1044
		1045	PUSHMARK (SP);
		1046	PUTBACK;
		1047	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1048
		1049	FREETMPS;
		1050	LEAVE;
		1051	continue;
		1052	}
		1053
		1054	ta->next = SvSTATE (next_sv);
		1055
		1056	/* cannot transfer to destroyed coros, skip and look for next */
		1057	if (ta->next->flags & CF_DESTROYED)
		1058	{
		1059	UNLOCK;
		1060	SvREFCNT_dec (next_sv);
		1061	/* coro_nready is already taken care of by destroy */
		1062	continue;
		1063	}
		1064
		1065	--coro_nready;
		1066	UNLOCK;
		1067	break;
		1068	}
		1069
		1070	/* free this only after the transfer */
		1071	prev_sv = SvRV (coro_current);
		1072	SvRV_set (coro_current, next_sv);
		1073	ta->prev = SvSTATE (prev_sv);
		1074
		1075	assert (ta->next->flags & CF_READY);
		1076	ta->next->flags &= ~CF_READY;
913		1077
914	LOCK;	1078	LOCK;
915
916	current = GvSV (coro_current);
917
918	for (;;)
919	{
920	LOCK;
921
922	next = coro_deq (PRIO_MIN);
923
924	if (next)
925	break;
926
927	UNLOCK;
928
929	{
930	dSP;
931
932	ENTER;
933	SAVETMPS;
934
935	PUSHMARK (SP);
936	PUTBACK;
937	call_sv (GvSV (coro_idle), G_DISCARD);
938
939	FREETMPS;
940	LEAVE;
941	}
942	}
943
944	prev = SvRV (current);
945	SvRV (current) = next;
946
947	/* free this only after the transfer */
948	free_coro_mortal ();	1079	free_coro_mortal ();
949	coro_mortal = prev;	1080	coro_mortal = prev_sv;
950
951	ta->prev = SvSTATE (prev);
952	ta->next = SvSTATE (next);
953	ta->flags = TRANSFER_SAVE_ALL;
954
955	UNLOCK;	1081	UNLOCK;
956	}	1082	}
957		1083
958	static void	1084	static void
959	prepare_cede (struct transfer_args *ta)	1085	prepare_cede (struct transfer_args *ta)
960	{	1086	{
961	LOCK;	1087	api_ready (coro_current);
962	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
963	UNLOCK;
964
965	prepare_schedule (ta);	1088	prepare_schedule (ta);
966	}	1089	}
967		1090
		1091	static int
		1092	prepare_cede_notself (struct transfer_args *ta)
		1093	{
		1094	if (coro_nready)
		1095	{
		1096	SV *prev = SvRV (coro_current);
		1097	prepare_schedule (ta);
		1098	api_ready (prev);
		1099	return 1;
		1100	}
		1101	else
		1102	return 0;
		1103	}
		1104
968	static void	1105	static void
969	api_schedule (void)	1106	api_schedule (void)
970	{	1107	{
971	dTHX;
972	struct transfer_args ta;	1108	struct transfer_args ta;
973		1109
974	prepare_schedule (&ta);	1110	prepare_schedule (&ta);
975	TRANSFER (ta);	1111	TRANSFER (ta);
976	}	1112	}
977		1113
978	static void	1114	static int
979	api_cede (void)	1115	api_cede (void)
980	{	1116	{
981	dTHX;
982	struct transfer_args ta;	1117	struct transfer_args ta;
983		1118
984	prepare_cede (&ta);	1119	prepare_cede (&ta);
		1120
		1121	if (ta.prev != ta.next)
		1122	{
985	TRANSFER (ta);	1123	TRANSFER (ta);
		1124	return 1;
		1125	}
		1126	else
		1127	return 0;
		1128	}
		1129
		1130	static int
		1131	api_cede_notself (void)
		1132	{
		1133	struct transfer_args ta;
		1134
		1135	if (prepare_cede_notself (&ta))
		1136	{
		1137	TRANSFER (ta);
		1138	return 1;
		1139	}
		1140	else
		1141	return 0;
986	}	1142	}
987		1143
988	MODULE = Coro::State PACKAGE = Coro::State	1144	MODULE = Coro::State PACKAGE = Coro::State
989		1145
990	PROTOTYPES: DISABLE	1146	PROTOTYPES: DISABLE
…		…
996	#endif	1152	#endif
997	BOOT_PAGESIZE;	1153	BOOT_PAGESIZE;
998		1154
999	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1155	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1000		1156
1001	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1157	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1002	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1158	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1003	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1159	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1160	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1161	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1004		1162
1005	main_mainstack = PL_mainstack;	1163	main_mainstack = PL_mainstack;
1006		1164
1007	coroapi.ver = CORO_API_VERSION;	1165	coroapi.ver = CORO_API_VERSION;
1008	coroapi.transfer = api_transfer;	1166	coroapi.transfer = api_transfer;
…		…
1018	HV *hv;	1176	HV *hv;
1019	int i;	1177	int i;
1020		1178
1021	Newz (0, coro, 1, struct coro);	1179	Newz (0, coro, 1, struct coro);
1022	coro->args = newAV ();	1180	coro->args = newAV ();
		1181	coro->save = CORO_SAVE_ALL;
		1182	coro->flags = CF_NEW;
1023		1183
1024	hv = newHV ();	1184	hv = newHV ();
1025	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1185	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1186	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027		1187
1028	for (i = 1; i < items; i++)	1188	for (i = 1; i < items; i++)
1029	av_push (coro->args, newSVsv (ST (i)));	1189	av_push (coro->args, newSVsv (ST (i)));
1030
1031	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1032	/*coro->stack = 0;*/
1033	}	1190	}
1034	OUTPUT:	1191	OUTPUT:
		1192	RETVAL
		1193
		1194	int
		1195	save (SV *coro, int new_save = -1)
		1196	CODE:
		1197	RETVAL = api_save (coro, new_save);
		1198	OUTPUT:
1035	RETVAL	1199	RETVAL
1036		1200
1037	void	1201	void
1038	_set_stacklevel (...)	1202	_set_stacklevel (...)
1039	ALIAS:	1203	ALIAS:
1040	Coro::State::transfer = 1	1204	Coro::State::transfer = 1
1041	Coro::schedule = 2	1205	Coro::schedule = 2
1042	Coro::cede = 3	1206	Coro::cede = 3
1043	Coro::Cont::yield = 4	1207	Coro::cede_notself = 4
1044	CODE:	1208	CODE:
1045	{	1209	{
1046	struct transfer_args ta;	1210	struct transfer_args ta;
1047		1211
1048	switch (ix)	1212	switch (ix)
1049	{	1213	{
1050	case 0:	1214	case 0:
1051	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1215	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1052	ta.next = 0;	1216	ta.next = 0;
1053	ta.flags = TRANSFER_SET_STACKLEVEL;
1054	break;	1217	break;
1055		1218
1056	case 1:	1219	case 1:
1057	if (items != 3)	1220	if (items != 2)
1058	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1221	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1059		1222
1060	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1223	prepare_transfer (&ta, ST (0), ST (1));
1061	break;	1224	break;
1062		1225
1063	case 2:	1226	case 2:
1064	prepare_schedule (&ta);	1227	prepare_schedule (&ta);
1065	break;	1228	break;
…		…
1067	case 3:	1230	case 3:
1068	prepare_cede (&ta);	1231	prepare_cede (&ta);
1069	break;	1232	break;
1070		1233
1071	case 4:	1234	case 4:
1072	{	1235	if (!prepare_cede_notself (&ta))
1073	SV *yieldstack;	1236	XSRETURN_EMPTY;
1074	SV *sv;
1075	AV *defav = GvAV (PL_defgv);
1076		1237
1077	yieldstack = *hv_fetch (
1078	(HV *)SvRV (GvSV (coro_current)),
1079	"yieldstack", sizeof ("yieldstack") - 1,
1080	0
1081	);
1082
1083	/* set up @_ -- ugly */
1084	av_clear (defav);
1085	av_fill (defav, items - 1);
1086	while (items--)
1087	av_store (defav, items, SvREFCNT_inc (ST(items)));
1088
1089	sv = av_pop ((AV *)SvRV (yieldstack));
1090	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1091	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1092	ta.flags = 0;
1093	SvREFCNT_dec (sv);
1094	}
1095	break;	1238	break;
1096
1097	}	1239	}
1098		1240
		1241	BARRIER;
1099	TRANSFER (ta);	1242	TRANSFER (ta);
1100	}
1101		1243
1102	void	1244	if (GIMME_V != G_VOID && ta.next != ta.prev)
1103	_clone_state_from (SV *dst, SV *src)	1245	XSRETURN_YES;
		1246	}
		1247
		1248	bool
		1249	_destroy (SV *coro_sv)
1104	CODE:	1250	CODE:
1105	{	1251	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1106	struct coro *coro_src = SvSTATE (src);	1252	OUTPUT:
1107		1253	RETVAL
1108	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1109
1110	++coro_src->refcnt;
1111	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1112	}
1113
1114	void
1115	_nonlocal_goto (IV nextop)
1116	CODE:
1117	/* uuh, somebody will kill me again for this */
1118	PL_op->op_next = INT2PTR (OP *, nextop);
1119		1254
1120	void	1255	void
1121	_exit (code)	1256	_exit (code)
1122	int code	1257	int code
1123	PROTOTYPE: $	1258	PROTOTYPE: $
1124	CODE:	1259	CODE:
1125	_exit (code);	1260	_exit (code);
1126		1261
		1262	int
		1263	cctx_count ()
		1264	CODE:
		1265	RETVAL = cctx_count;
		1266	OUTPUT:
		1267	RETVAL
		1268
		1269	int
		1270	cctx_idle ()
		1271	CODE:
		1272	RETVAL = cctx_idle;
		1273	OUTPUT:
		1274	RETVAL
		1275
1127	MODULE = Coro::State PACKAGE = Coro	1276	MODULE = Coro::State PACKAGE = Coro
1128		1277
1129	BOOT:	1278	BOOT:
1130	{	1279	{
1131	int i;	1280	int i;
…		…
1137	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1286	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1138	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1287	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1139	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1288	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1140	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1289	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1141		1290
1142	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1291	coro_current = get_sv ("Coro::current", FALSE);
1143	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1292	SvREADONLY_on (coro_current);
1144		1293
1145	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1294	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1146	coro_ready[i] = newAV ();	1295	coro_ready[i] = newAV ();
1147		1296
1148	{	1297	{
1149	SV *sv = perl_get_sv("Coro::API", 1);	1298	SV *sv = perl_get_sv("Coro::API", 1);
1150		1299
1151	coroapi.schedule = api_schedule;	1300	coroapi.schedule = api_schedule;
		1301	coroapi.save = api_save;
1152	coroapi.cede = api_cede;	1302	coroapi.cede = api_cede;
		1303	coroapi.cede_notself = api_cede_notself;
1153	coroapi.ready = api_ready;	1304	coroapi.ready = api_ready;
		1305	coroapi.is_ready = api_is_ready;
1154	coroapi.nready = &coro_nready;	1306	coroapi.nready = &coro_nready;
1155	coroapi.current = coro_current;	1307	coroapi.current = coro_current;
1156		1308
1157	GCoroAPI = &coroapi;	1309	GCoroAPI = &coroapi;
1158	sv_setiv (sv, (IV)&coroapi);	1310	sv_setiv (sv, (IV)&coroapi);
1159	SvREADONLY_on (sv);	1311	SvREADONLY_on (sv);
1160	}	1312	}
1161	}	1313	}
		1314
		1315	void
		1316	_set_current (SV *current)
		1317	PROTOTYPE: $
		1318	CODE:
		1319	SvREFCNT_dec (SvRV (coro_current));
		1320	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1162		1321
1163	int	1322	int
1164	prio (Coro::State coro, int newprio = 0)	1323	prio (Coro::State coro, int newprio = 0)
1165	ALIAS:	1324	ALIAS:
1166	nice = 1	1325	nice = 1
…		…
1169	RETVAL = coro->prio;	1328	RETVAL = coro->prio;
1170		1329
1171	if (items > 1)	1330	if (items > 1)
1172	{	1331	{
1173	if (ix)	1332	if (ix)
1174	newprio += coro->prio;	1333	newprio = coro->prio - newprio;
1175		1334
1176	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1335	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1177	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1336	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1178		1337
1179	coro->prio = newprio;	1338	coro->prio = newprio;
1180	}	1339	}
1181	}	1340	}
		1341	OUTPUT:
		1342	RETVAL
1182		1343
1183	void	1344	SV *
1184	ready (SV *self)	1345	ready (SV *self)
1185	PROTOTYPE: $	1346	PROTOTYPE: $
1186	CODE:	1347	CODE:
1187	api_ready (self);	1348	RETVAL = boolSV (api_ready (self));
		1349	OUTPUT:
		1350	RETVAL
		1351
		1352	SV *
		1353	is_ready (SV *self)
		1354	PROTOTYPE: $
		1355	CODE:
		1356	RETVAL = boolSV (api_is_ready (self));
		1357	OUTPUT:
		1358	RETVAL
1188		1359
1189	int	1360	int
1190	nready (...)	1361	nready (...)
1191	PROTOTYPE:	1362	PROTOTYPE:
1192	CODE:	1363	CODE:
…		…
1198		1369
1199	SV *	1370	SV *
1200	_get_state ()	1371	_get_state ()
1201	CODE:	1372	CODE:
1202	{	1373	{
1203	struct {	1374	struct io_state *data;
1204	int errorno;
1205	int laststype;
1206	int laststatval;
1207	Stat_t statcache;
1208	} data;
1209		1375
		1376	RETVAL = newSV (sizeof (struct io_state));
		1377	data = (struct io_state *)SvPVX (RETVAL);
		1378	SvCUR_set (RETVAL, sizeof (struct io_state));
		1379	SvPOK_only (RETVAL);
		1380
1210	data.errorno = errno;	1381	data->errorno = errno;
1211	data.laststype = PL_laststype;	1382	data->laststype = PL_laststype;
1212	data.laststatval = PL_laststatval;	1383	data->laststatval = PL_laststatval;
1213	data.statcache = PL_statcache;	1384	data->statcache = PL_statcache;
1214
1215	RETVAL = newSVpvn ((char *)&data, sizeof data);
1216	}	1385	}
1217	OUTPUT:	1386	OUTPUT:
1218	RETVAL	1387	RETVAL
1219		1388
1220	void	1389	void
1221	_set_state (char *data_)	1390	_set_state (char *data_)
1222	PROTOTYPE: $	1391	PROTOTYPE: $
1223	CODE:	1392	CODE:
1224	{	1393	{
1225	struct {	1394	struct io_state *data = (void *)data_;
1226	int errorno;
1227	int laststype;
1228	int laststatval;
1229	Stat_t statcache;
1230	} *data = (void *)data_;
1231		1395
1232	errno = data->errorno;	1396	errno = data->errorno;
1233	PL_laststype = data->laststype;	1397	PL_laststype = data->laststype;
1234	PL_laststatval = data->laststatval;	1398	PL_laststatval = data->laststatval;
1235	PL_statcache = data->statcache;	1399	PL_statcache = data->statcache;
1236	}	1400	}
		1401

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