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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.91 by root, Sat Nov 25 01:14:11 2006 UTC vs.
Revision 1.199 by root, Sun Oct 7 13:53:37 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if PERL_VERSION < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15
		16	#ifdef HAVE_MMAP
		17	# include <unistd.h>
		18	# include <sys/mman.h>
		19	# ifndef MAP_ANONYMOUS
		20	# ifdef MAP_ANON
		21	# define MAP_ANONYMOUS MAP_ANON
		22	# else
		23	# undef HAVE_MMAP
		24	# endif
		25	# endif
		26	# include <limits.h>
		27	# ifndef PAGESIZE
		28	# define PAGESIZE pagesize
		29	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		30	static long pagesize;
		31	# else
		32	# define BOOT_PAGESIZE (void)0
		33	# endif
		34	#else
		35	# define PAGESIZE 0
		36	# define BOOT_PAGESIZE (void)0
		37	#endif
		38
		39	#if CORO_USE_VALGRIND
		40	# include <valgrind/valgrind.h>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
		45
		46	/* the maximum number of idle cctx that will be pooled */
		47	#define MAX_IDLE_CCTX 8
		48
		49	#define PERL_VERSION_ATLEAST(a,b,c) \
		50	(PERL_REVISION > (a) \
		51	|| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	56	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	57	# define PL_ppaddr ppaddr
14	# endif	58	# endif
15	# ifndef call_sv	59	# ifndef call_sv
16	# define call_sv perl_call_sv	60	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	71	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	72	# define IS_PADCONST(v) 0
29	# endif	73	# endif
30	#endif	74	#endif
31		75
32	#include <errno.h>	76	/* 5.8.7 */
		77	#ifndef SvRV_set
		78	# define SvRV_set(s,v) SvRV(s) = (v)
		79	#endif
		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
33		88
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	90	# 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	91	#endif
52	# include <limits.h>	92
53	# ifndef PAGESIZE	93	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	94	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	95	#endif
60	#endif
61		96
62	#define SUB_INIT "Coro::State::initialize"	97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
63		101
64	/* The next macro should declare a variable stacklevel that contains and approximation	102	/* The next macros try to return the current stack pointer, in an as
65	* to the current C stack pointer. Its property is that it changes with each call	103	* portable way as possible. */
66	* and should be unique. */	104	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
68		106
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		108
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	109	#if __GNUC__ >= 3
		110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
		113	#else
		114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
		117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
		121
		122	#define NOINLINE attribute ((noinline))
72		123
73	#include "CoroAPI.h"	124	#include "CoroAPI.h"
74		125
75	#ifdef USE_ITHREADS	126	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	127	static perl_mutex coro_mutex;
…		…
79	#else	130	#else
80	# define LOCK (void)0	131	# define LOCK (void)0
81	# define UNLOCK (void)0	132	# define UNLOCK (void)0
82	#endif	133	#endif
83		134
		135	/* helper storage struct for Coro::AIO */
		136	struct io_state
		137	{
		138	int errorno;
		139	I32 laststype;
		140	int laststatval;
		141	Stat_t statcache;
		142	};
		143
		144	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	145	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	146	static AV *main_mainstack; /* used to differentiate between $main and others */
		147	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	148	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	149	static SV *coro_mortal; /* will be freed after next transfer */
88		150
89	/* this is actually not just the c stack but also c registers etc... */	151	static GV *irsgv; /* $/ */
		152	static GV *stdoutgv; /* *STDOUT */
		153	static SV *sv_diehook;
		154	static SV *sv_warnhook;
		155
		156	/* async_pool helper stuff */
		157	static SV *sv_pool_rss;
		158	static SV *sv_pool_size;
		159	static AV *av_async_pool;
		160
		161	static struct coro_cctx *cctx_first;
		162	static int cctx_count, cctx_idle;
		163
		164	enum {
		165	CC_MAPPED = 0x01,
		166	CC_NOREUSE = 0x02, /* throw this away after tracing */
		167	CC_TRACE = 0x04,
		168	CC_TRACE_SUB = 0x08, /* trace sub calls */
		169	CC_TRACE_LINE = 0x10, /* trace each statement */
		170	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		171	};
		172
		173	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	174	typedef struct coro_cctx {
91	struct coro_stack *next;	175	struct coro_cctx *next;
92		176
93	void *idle_sp;	177	/* the stack */
94	void *sptr;	178	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	179	size_t ssize;
96		180
97	/* cpu state */	181	/* cpu state */
		182	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		183	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		184	JMPENV *top_env;
98	coro_context cctx;	185	coro_context cctx;
99	} coro_stack;
100		186
101	static coro_stack *main_stack;	187	#if CORO_USE_VALGRIND
		188	int valgrind_id;
		189	#endif
		190	unsigned char flags;
		191	} coro_cctx;
102		192
		193	enum {
		194	CF_RUNNING = 0x0001, /* coroutine is running */
		195	CF_READY = 0x0002, /* coroutine is ready */
		196	CF_NEW = 0x0004, /* has never been switched to */
		197	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		198	};
		199
		200	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		201	typedef struct {
		202	SV *defsv;
		203	AV *defav;
		204	SV *errsv;
		205	SV *irsgv;
		206	#define VAR(name,type) type name;
		207	# include "state.h"
		208	#undef VAR
		209	} perl_slots;
		210
		211	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		212
		213	/* this is a structure representing a perl-level coroutine */
103	struct coro {	214	struct coro {
104	/* optionally saved, might be zero */	215	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	216	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112		217
113	/* the c stack, if any */	218	/* process data */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;	219	AV *mainstack;
120	SV **stack_sp;	220	perl_slots *slot; /* basically the saved sp */
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146
147	/* coro process data */
148	int prio;
149		221
150	/* data associated with this coroutine (initial args) */	222	/* data associated with this coroutine (initial args) */
151	AV *args;	223	AV *args;
152	int refcnt;	224	int refcnt;
		225	int flags; /* CF_ flags */
		226
		227	/* statistics */
		228	int usecount; /* number of transfers to this coro */
		229
		230	/* coro process data */
		231	int prio;
		232	SV *throw;
		233
		234	/* async_pool */
		235	SV *saved_deffh;
		236
		237	/* linked list */
		238	struct coro *next, *prev;
		239	HV *hv; /* the perl hash associated with this coro, if any */
153	};	240	};
154		241
155	typedef struct coro *Coro__State;	242	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	243	typedef struct coro *Coro__State_or_hashref;
157		244
		245	/** Coro ********************************************************************/
		246
		247	#define PRIO_MAX 3
		248	#define PRIO_HIGH 1
		249	#define PRIO_NORMAL 0
		250	#define PRIO_LOW -1
		251	#define PRIO_IDLE -3
		252	#define PRIO_MIN -4
		253
		254	/* for Coro.pm */
		255	static SV *coro_current;
		256	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		257	static int coro_nready;
		258	static struct coro *coro_first;
		259
		260	/** lowlevel stuff **********************************************************/
		261
		262	static SV *
		263	coro_get_sv (const char *name, int create)
		264	{
		265	#if PERL_VERSION_ATLEAST (5,9,0)
		266	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		267	get_sv (name, create);
		268	#endif
		269	return get_sv (name, create);
		270	}
		271
		272	static SV *
		273	coro_get_av (const char *name, int create)
		274	{
		275	#if PERL_VERSION_ATLEAST (5,9,0)
		276	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		277	get_av (name, create);
		278	#endif
		279	return get_av (name, create);
		280	}
		281
158	static AV *	282	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	283	coro_clone_padlist (pTHX_ CV *cv)
160	{	284	{
161	AV *padlist = CvPADLIST (cv);	285	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	286	AV *newpadlist, *newpad;
163		287
164	newpadlist = newAV ();	288	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	289	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	290	#if PERL_VERSION_ATLEAST (5,9,0)
		291	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		292	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	293	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	294	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	295	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	296	--AvFILLp (padlist);
173		297
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	298	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		342
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	343	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		344
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	345	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		346
		347	#define CORO_MAGIC(cv) \
		348	SvMAGIC (cv) \
		349	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		350	? SvMAGIC (cv) \
		351	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		352	: 0
		353
		354	static struct coro *
		355	SvSTATE_ (pTHX_ SV *coro)
		356	{
		357	HV *stash;
		358	MAGIC *mg;
		359
		360	if (SvROK (coro))
		361	coro = SvRV (coro);
		362
		363	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		364	croak ("Coro::State object required");
		365
		366	stash = SvSTASH (coro);
		367	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		368	{
		369	/* very slow, but rare, check */
		370	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		371	croak ("Coro::State object required");
		372	}
		373
		374	mg = CORO_MAGIC (coro);
		375	return (struct coro *)mg->mg_ptr;
		376	}
		377
		378	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		379
223	/* the next two functions merely cache the padlists */	380	/* the next two functions merely cache the padlists */
224	static void	381	static void
225	get_padlist (pTHX_ CV *cv)	382	get_padlist (pTHX_ CV *cv)
226	{	383	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	384	MAGIC *mg = CORO_MAGIC (cv);
		385	AV *av;
228		386
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	387	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	388	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	389	else
232	{	390	{
233	#if 0	391	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	392	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	393	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	394	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	395	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	396	SvREFCNT_dec (cp);
239	#else	397	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	398	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	401	}
244		402
245	static void	403	static void
246	put_padlist (pTHX_ CV *cv)	404	put_padlist (pTHX_ CV *cv)
247	{	405	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	406	MAGIC *mg = CORO_MAGIC (cv);
		407	AV *av;
249		408
250	if (!mg)	409	if (expect_false (!mg))
251	{	410	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	411	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	412	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	413	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	414	mg->mg_obj = (SV *)newAV ();
256	}	415	}
257		416
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	417	av = (AV *)mg->mg_obj;
259	}
260		418
261	#define SB do {	419	if (expect_false (AvFILLp (av) >= AvMAX (av)))
262	#define SE } while (0)	420	av_extend (av, AvMAX (av) + 1);
263		421
264	#define LOAD(state) load_state(aTHX_ (state));	422	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	423	}
266		424
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	425	/** load & save, init *******************************************************/
268		426
269	static void	427	static void
270	load_state(pTHX_ Coro__State c)	428	load_perl (pTHX_ Coro__State c)
271	{	429	{
272	PL_dowarn = c->dowarn;	430	perl_slots *slot = c->slot;
273	PL_in_eval = c->in_eval;	431	c->slot = 0;
274		432
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;	433	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		434
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	435	GvSV (PL_defgv) = slot->defsv;
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	436	GvAV (PL_defgv) = slot->defav;
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	437	GvSV (PL_errgv) = slot->errsv;
		438	GvSV (irsgv) = slot->irsgv;
		439
		440	#define VAR(name,type) PL_ ## name = slot->name;
		441	# include "state.h"
		442	#undef VAR
310		443
311	{	444	{
312	dSP;	445	dSP;
		446
313	CV *cv;	447	CV *cv;
314		448
315	/* now do the ugly restore mess */	449	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	450	while (expect_true (cv = (CV *)POPs))
317	{	451	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	452	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	453	CvDEPTH (cv) = PTR2IV (POPs);
324	}	454	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	455	}
328		456
329	PUTBACK;	457	PUTBACK;
330	}	458	}
331	}	459	}
332		460
333	static void	461	static void
334	save_state(pTHX_ Coro__State c, int flags)	462	save_perl (pTHX_ Coro__State c)
335	{	463	{
336	{	464	{
337	dSP;	465	dSP;
338	I32 cxix = cxstack_ix;	466	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	467	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	470	/*
343	* the worst thing you can imagine happens first - we have to save	471	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	472	* (and reinitialize) all cv's in the whole callchain :(
345	*/	473	*/
346		474
347	PUSHs (Nullsv);	475	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	476	/* this loop was inspired by pp_caller */
349	for (;;)	477	for (;;)
350	{	478	{
351	while (cxix >= 0)	479	while (expect_true (cxix >= 0))
352	{	480	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	481	PERL_CONTEXT *cx = &ccstk[cxix--];
354		482
355	if (CxTYPE(cx) == CXt_SUB)	483	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
356	{	484	{
357	CV *cv = cx->blk_sub.cv;	485	CV *cv = cx->blk_sub.cv;
		486
358	if (CvDEPTH(cv))	487	if (expect_true (CvDEPTH (cv)))
359	{	488	{
360	EXTEND (SP, CvDEPTH(cv)*2);	489	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	490	PUSHs ((SV *)CvPADLIST (cv));
		491	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	492	PUSHs ((SV *)cv);
371		493
		494	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	495	get_padlist (aTHX_ cv);
373	}	496	}
374	}	497	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	498	}
384		499
385	if (top_si->si_type == PERLSI_MAIN)	500	if (expect_true (top_si->si_type == PERLSI_MAIN))
386	break;	501	break;
387		502
388	top_si = top_si->si_prev;	503	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	504	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	505	cxix = top_si->si_cxix;
391	}	506	}
392		507
393	PUTBACK;	508	PUTBACK;
394	}	509	}
395		510
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	511	/* allocate some space on the context stack for our purposes */
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	512	{
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	513	/* we manually unroll here, as usually 2 slots is enough */
		514	int i;
		515	if (SLOT_COUNT >= 1) CXINC;
		516	if (SLOT_COUNT >= 2) CXINC;
		517	if (SLOT_COUNT >= 3) CXINC;
		518	for (i = 3; i < SLOT_COUNT; ++i)
		519	CXINC;
399		520
400	c->dowarn = PL_dowarn;	521	cxstack_ix -= SLOT_COUNT; /* undo allocation */
401	c->in_eval = PL_in_eval;	522	}
402		523
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;	524	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;	525
407	c->op = PL_op;	526	{
408	c->curpad = PL_curpad;	527	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
409	c->comppad = PL_comppad;	528
410	c->compcv = PL_compcv;	529	slot->defav = GvAV (PL_defgv);
411	c->stack_base = PL_stack_base;	530	slot->defsv = DEFSV;
412	c->stack_max = PL_stack_max;	531	slot->errsv = ERRSV;
413	c->tmps_stack = PL_tmps_stack;	532	slot->irsgv = GvSV (irsgv);
414	c->tmps_floor = PL_tmps_floor;	533
415	c->tmps_ix = PL_tmps_ix;	534	#define VAR(name,type) slot->name = PL_ ## name;
416	c->tmps_max = PL_tmps_max;	535	# include "state.h"
417	c->markstack = PL_markstack;	536	#undef VAR
418	c->markstack_ptr = PL_markstack_ptr;	537	}
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	538	}
435		539
436	/*	540	/*
437	* allocate various perl stacks. This is an exact copy	541	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	542	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	543	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	544	* not usually need a lot of stackspace.
441	*/	545	*/
		546	#if CORO_PREFER_PERL_FUNCTIONS
		547	# define coro_init_stacks init_stacks
		548	#else
442	static void	549	static void
443	coro_init_stacks (pTHX)	550	coro_init_stacks (pTHX)
444	{	551	{
445	LOCK;	552	PL_curstackinfo = new_stackinfo(32, 8);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	553	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	554	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	555	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		556
452	PL_stack_base = AvARRAY(PL_curstack);	557	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	558	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	559	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		560
456	New(50,PL_tmps_stack,96,SV*);	561	New(50,PL_tmps_stack,32,SV*);
457	PL_tmps_floor = -1;	562	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	563	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	564	PL_tmps_max = 32;
460		565
461	New(54,PL_markstack,16,I32);	566	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	567	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	568	PL_markstack_max = PL_markstack + 16;
464		569
465	#ifdef SET_MARK_OFFSET	570	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	571	SET_MARK_OFFSET;
467	#endif	572	#endif
468		573
469	New(54,PL_scopestack,16,I32);	574	New(54,PL_scopestack,8,I32);
470	PL_scopestack_ix = 0;	575	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	576	PL_scopestack_max = 8;
472		577
473	New(54,PL_savestack,96,ANY);	578	New(54,PL_savestack,24,ANY);
474	PL_savestack_ix = 0;	579	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	580	PL_savestack_max = 24;
476		581
477	#if PERL_VERSION < 9	582	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	583	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	584	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	585	PL_retstack_max = 4;
481	#endif	586	#endif
482
483	UNLOCK;
484	}	587	}
		588	#endif
485		589
486	/*	590	/*
487	* destroy the stacks, the callchain etc...	591	* destroy the stacks, the callchain etc...
488	*/	592	*/
489	static void	593	static void
490	destroy_stacks(pTHX)	594	coro_destroy_stacks (pTHX)
491	{	595	{
492	if (!IN_DESTRUCT)
493	{
494	/* is this ugly, I ask? */
495	LEAVE_SCOPE (0);
496
497	/* sure it is, but more important: is it correct?? :/ */
498	FREETMPS;
499
500	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
501	}
502
503	while (PL_curstackinfo->si_next)	596	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	597	PL_curstackinfo = PL_curstackinfo->si_next;
505		598
506	while (PL_curstackinfo)	599	while (PL_curstackinfo)
507	{	600	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	601	PERL_SI *p = PL_curstackinfo->si_prev;
509		602
510	{ /*D*//*remove*/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	603	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/*D*//*remove*/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	604	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		605
522	Safefree (PL_curstackinfo->si_cxstack);	606	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	607	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	608	PL_curstackinfo = p;
525	}	609	}
526		610
527	Safefree (PL_tmps_stack);	611	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	612	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	613	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	614	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	615	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	616	Safefree (PL_retstack);
533	#endif	617	#endif
534	}	618	}
535		619
536	static void	620	static size_t
537	setup_coro (struct coro *coro)	621	coro_rss (pTHX_ struct coro *coro)
		622	{
		623	size_t rss = sizeof (*coro);
		624
		625	if (coro->mainstack)
		626	{
		627	perl_slots tmp_slot;
		628	perl_slots *slot;
		629
		630	if (coro->flags & CF_RUNNING)
		631	{
		632	slot = &tmp_slot;
		633
		634	#define VAR(name,type) slot->name = PL_ ## name;
		635	# include "state.h"
		636	#undef VAR
		637	}
		638	else
		639	slot = coro->slot;
		640
		641	rss += sizeof (slot->curstackinfo);
		642	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		643	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		644	rss += slot->tmps_max * sizeof (SV *);
		645	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		646	rss += slot->scopestack_max * sizeof (I32);
		647	rss += slot->savestack_max * sizeof (ANY);
		648
		649	#if !PERL_VERSION_ATLEAST (5,9,0)
		650	rss += slot->retstack_max * sizeof (OP *);
		651	#endif
		652	}
		653
		654	return rss;
		655	}
		656
		657	/** coroutine stack handling ************************************************/
		658
		659	static void
		660	coro_setup (pTHX_ struct coro *coro)
538	{	661	{
539	/*	662	/*
540	* emulate part of the perl startup here.	663	* emulate part of the perl startup here.
541	*/	664	*/
542	dTHX;	665	coro_init_stacks (aTHX);
		666
		667	PL_runops = RUNOPS_DEFAULT;
		668	PL_curcop = &PL_compiling;
		669	PL_in_eval = EVAL_NULL;
		670	PL_comppad = 0;
		671	PL_curpm = 0;
		672	PL_curpad = 0;
		673	PL_localizing = 0;
		674	PL_dirty = 0;
		675	PL_restartop = 0;
		676	PL_diehook = SvREFCNT_inc (sv_diehook);
		677	PL_warnhook = SvREFCNT_inc (sv_warnhook);
		678
		679	GvSV (PL_defgv) = newSV (0);
		680	GvAV (PL_defgv) = coro->args; coro->args = 0;
		681	GvSV (PL_errgv) = newSV (0);
		682	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		683	PL_rs = newSVsv (GvSV (irsgv));
		684	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		685
		686	{
		687	dSP;
		688	LOGOP myop;
		689
		690	Zero (&myop, 1, LOGOP);
		691	myop.op_next = Nullop;
		692	myop.op_flags = OPf_WANT_VOID;
		693
		694	PUSHMARK (SP);
		695	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		696	PUTBACK;
		697	PL_op = (OP *)&myop;
		698	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		699	SPAGAIN;
		700	}
		701
		702	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		703	}
		704
		705	static void
		706	coro_destroy (pTHX_ struct coro *coro)
		707	{
		708	if (!IN_DESTRUCT)
		709	{
		710	/* restore all saved variables and stuff */
		711	LEAVE_SCOPE (0);
		712	assert (PL_tmps_floor == -1);
		713
		714	/* free all temporaries */
		715	FREETMPS;
		716	assert (PL_tmps_ix == -1);
		717
		718	/* unwind all extra stacks */
		719	POPSTACK_TO (PL_mainstack);
		720
		721	/* unwind main stack */
		722	dounwind (-1);
		723	}
		724
		725	SvREFCNT_dec (GvSV (PL_defgv));
		726	SvREFCNT_dec (GvAV (PL_defgv));
		727	SvREFCNT_dec (GvSV (PL_errgv));
		728	SvREFCNT_dec (PL_defoutgv);
		729	SvREFCNT_dec (PL_rs);
		730	SvREFCNT_dec (GvSV (irsgv));
		731
		732	SvREFCNT_dec (PL_diehook);
		733	SvREFCNT_dec (PL_warnhook);
		734
		735	SvREFCNT_dec (coro->saved_deffh);
		736	SvREFCNT_dec (coro->throw);
		737
		738	coro_destroy_stacks (aTHX);
		739	}
		740
		741	static void
		742	free_coro_mortal (pTHX)
		743	{
		744	if (expect_true (coro_mortal))
		745	{
		746	SvREFCNT_dec (coro_mortal);
		747	coro_mortal = 0;
		748	}
		749	}
		750
		751	static int
		752	runops_trace (pTHX)
		753	{
		754	COP *oldcop = 0;
		755	int oldcxix = -2;
		756	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		757	coro_cctx *cctx = coro->cctx;
		758
		759	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		760	{
		761	PERL_ASYNC_CHECK ();
		762
		763	if (cctx->flags & CC_TRACE_ALL)
		764	{
		765	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		766	{
		767	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		768	SV **bot, **top;
		769	AV *av = newAV (); /* return values */
		770	SV **cb;
		771	dSP;
		772
		773	GV *gv = CvGV (cx->blk_sub.cv);
		774	SV *fullname = sv_2mortal (newSV (0));
		775	if (isGV (gv))
		776	gv_efullname3 (fullname, gv, 0);
		777
		778	bot = PL_stack_base + cx->blk_oldsp + 1;
		779	top = cx->blk_gimme == G_ARRAY ? SP + 1
		780	: cx->blk_gimme == G_SCALAR ? bot + 1
		781	: bot;
		782
		783	av_extend (av, top - bot);
		784	while (bot < top)
		785	av_push (av, SvREFCNT_inc (*bot++));
		786
		787	PL_runops = RUNOPS_DEFAULT;
		788	ENTER;
		789	SAVETMPS;
		790	EXTEND (SP, 3);
		791	PUSHMARK (SP);
		792	PUSHs (&PL_sv_no);
		793	PUSHs (fullname);
		794	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		795	PUTBACK;
		796	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		797	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		798	SPAGAIN;
		799	FREETMPS;
		800	LEAVE;
		801	PL_runops = runops_trace;
		802	}
		803
		804	if (oldcop != PL_curcop)
		805	{
		806	oldcop = PL_curcop;
		807
		808	if (PL_curcop != &PL_compiling)
		809	{
		810	SV **cb;
		811
		812	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		813	{
		814	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		815
		816	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		817	{
		818	runops_proc_t old_runops = PL_runops;
		819	dSP;
		820	GV *gv = CvGV (cx->blk_sub.cv);
		821	SV *fullname = sv_2mortal (newSV (0));
		822
		823	if (isGV (gv))
		824	gv_efullname3 (fullname, gv, 0);
		825
		826	PL_runops = RUNOPS_DEFAULT;
		827	ENTER;
		828	SAVETMPS;
		829	EXTEND (SP, 3);
		830	PUSHMARK (SP);
		831	PUSHs (&PL_sv_yes);
		832	PUSHs (fullname);
		833	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		834	PUTBACK;
		835	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		836	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		837	SPAGAIN;
		838	FREETMPS;
		839	LEAVE;
		840	PL_runops = runops_trace;
		841	}
		842
		843	oldcxix = cxstack_ix;
		844	}
		845
		846	if (cctx->flags & CC_TRACE_LINE)
		847	{
		848	dSP;
		849
		850	PL_runops = RUNOPS_DEFAULT;
		851	ENTER;
		852	SAVETMPS;
		853	EXTEND (SP, 3);
		854	PL_runops = RUNOPS_DEFAULT;
		855	PUSHMARK (SP);
		856	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		857	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		858	PUTBACK;
		859	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		860	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		861	SPAGAIN;
		862	FREETMPS;
		863	LEAVE;
		864	PL_runops = runops_trace;
		865	}
		866	}
		867	}
		868	}
		869	}
		870
		871	TAINT_NOT;
		872	return 0;
		873	}
		874
		875	/* inject a fake call to Coro::State::_cctx_init into the execution */
		876	/* _cctx_init should be careful, as it could be called at almost any time */
		877	/* during execution of a perl program */
		878	static void NOINLINE
		879	prepare_cctx (pTHX_ coro_cctx *cctx)
		880	{
543	dSP;	881	dSP;
544	UNOP myop;	882	LOGOP myop;
545	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546		883
547	coro_init_stacks (aTHX);	884	PL_top_env = &PL_start_env;
548	/*PL_curcop = 0;*/
549	/*PL_in_eval = PL_in_eval;*/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552		885
553	SPAGAIN;	886	if (cctx->flags & CC_TRACE)
		887	PL_runops = runops_trace;
554		888
555	Zero (&myop, 1, UNOP);	889	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	890	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	891	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		892
		893	PUSHMARK (SP);
		894	EXTEND (SP, 2);
		895	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		896	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		897	PUTBACK;
559	PL_op = (OP *)&myop;	898	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	899	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	900	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	901	}
569		902
		903	/*
		904	* this is a _very_ stripped down perl interpreter ;)
		905	*/
570	static void	906	static void
571	transfer_tail ()	907	coro_run (void *arg)
572	{	908	{
573	if (coro_mortal)	909	dTHX;
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578		910
		911	/* coro_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	912	UNLOCK;
580	}
581		913
582	static void	914	/* we now skip the entersub that lead to transfer() */
583	coro_run (void *arg)	915	PL_op = PL_op->op_next;
584	{	916
		917	/* inject a fake subroutine call to cctx_init */
		918	prepare_cctx (aTHX_ (coro_cctx *)arg);
		919
		920	/* somebody or something will hit me for both perl_run and PL_restartop */
		921	PL_restartop = PL_op;
		922	perl_run (PL_curinterp);
		923
585	/*	924	/*
586	* this is a _very_ stripped down perl interpreter ;)	925	* If perl-run returns we assume exit() was being called or the coro
		926	* fell off the end, which seems to be the only valid (non-bug)
		927	* reason for perl_run to return. We try to exit by jumping to the
		928	* bootstrap-time "top" top_env, as we cannot restore the "main"
		929	* coroutine as Coro has no such concept
587	*/	930	*/
588	dTHX;
589
590	transfer_tail ();
591
592	PL_top_env = &PL_start_env;	931	PL_top_env = main_top_env;
593	PL_restartop = PL_op;	932	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	/* somebody will hit me for both perl_run and PL_restart_top */
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}	933	}
599		934
600	static coro_stack *	935	static coro_cctx *
601	stack_new ()	936	cctx_new ()
602	{	937	{
603	coro_stack *stack;	938	coro_cctx *cctx;
		939	void *stack_start;
		940	size_t stack_size;
604		941
		942	++cctx_count;
		943
605	New (0, stack, 1, coro_stack);	944	Newz (0, cctx, 1, coro_cctx);
606		945
607	#if HAVE_MMAP	946	#if HAVE_MMAP
608		947
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	948	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		949	/* mmap supposedly does allocate-on-write for us */
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	950	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611		951
612	if (stack->sptr == (void *)-1)	952	if (cctx->sptr != (void *)-1)
		953	{
		954	# if CORO_STACKGUARD
		955	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		956	# endif
		957	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		958	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		959	cctx->flags |= CC_MAPPED;
613	{	960	}
		961	else
		962	#endif
		963	{
		964	cctx->ssize = coro_stacksize * (long)sizeof (long);
		965	New (0, cctx->sptr, coro_stacksize, long);
		966
		967	if (!cctx->sptr)
		968	{
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	969	perror ("FATAL: unable to allocate stack for coroutine");
615	_exit (EXIT_FAILURE);	970	_exit (EXIT_FAILURE);
		971	}
		972
		973	stack_start = cctx->sptr;
		974	stack_size = cctx->ssize;
		975	}
		976
		977	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		978	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		979
		980	return cctx;
		981	}
		982
		983	static void
		984	cctx_destroy (coro_cctx *cctx)
		985	{
		986	if (!cctx)
		987	return;
		988
		989	--cctx_count;
		990
		991	#if CORO_USE_VALGRIND
		992	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		993	#endif
		994
		995	#if HAVE_MMAP
		996	if (cctx->flags & CC_MAPPED)
		997	munmap (cctx->sptr, cctx->ssize);
		998	else
		999	#endif
		1000	Safefree (cctx->sptr);
		1001
		1002	Safefree (cctx);
		1003	}
		1004
		1005	/* wether this cctx should be destructed */
		1006	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1007
		1008	static coro_cctx *
		1009	cctx_get (pTHX)
		1010	{
		1011	while (expect_true (cctx_first))
616	}	1012	{
		1013	coro_cctx *cctx = cctx_first;
		1014	cctx_first = cctx->next;
		1015	--cctx_idle;
617		1016
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1017	if (expect_true (!CCTX_EXPIRED (cctx)))
		1018	return cctx;
619		1019
		1020	cctx_destroy (cctx);
		1021	}
		1022
		1023	return cctx_new ();
		1024	}
		1025
		1026	static void
		1027	cctx_put (coro_cctx *cctx)
		1028	{
		1029	/* free another cctx if overlimit */
		1030	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1031	{
		1032	coro_cctx *first = cctx_first;
		1033	cctx_first = first->next;
		1034	--cctx_idle;
		1035
		1036	cctx_destroy (first);
		1037	}
		1038
		1039	++cctx_idle;
		1040	cctx->next = cctx_first;
		1041	cctx_first = cctx;
		1042	}
		1043
		1044	/** coroutine switching *****************************************************/
		1045
		1046	static void
		1047	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1048	{
		1049	if (expect_true (prev != next))
		1050	{
		1051	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1052	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1053
		1054	if (expect_false (next->flags & CF_RUNNING))
		1055	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1056
		1057	if (expect_false (next->flags & CF_DESTROYED))
		1058	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1059
		1060	if (
		1061	#if PERL_VERSION_ATLEAST (5,9,0)
		1062	expect_false (PL_parser)
620	#else	1063	#else
621		1064	expect_false (PL_lex_state != LEX_NOTPARSING)
622	stack->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);
624
625	if (!stack->sptr)
626	{
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630
631	#endif	1065	#endif
632		1066	)
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);	1067	croak ("Coro::State::transfer called while parsing, but this is not supported");
634
635	return stack;
636	}
637
638	static void
639	stack_free (coro_stack *stack)
640	{
641	if (!stack || stack == main_stack)
642	return;
643
644	#if HAVE_MMAP
645	munmap (stack->sptr, stack->ssize);
646	#else
647	Safefree (stack->sptr);
648	#endif
649
650	Safefree (stack);
651	}
652
653	static coro_stack *stack_first;
654
655	static coro_stack *
656	stack_get ()
657	{
658	coro_stack *stack;
659
660	if (stack_first)
661	{
662	stack = stack_first;
663	stack_first = stack->next;
664	}
665	else
666	{
667	stack = stack_new ();
668	PL_op = PL_op->op_next;
669	}	1068	}
670
671	return stack;
672	}	1069	}
673		1070
674	static void	1071	/* always use the TRANSFER macro */
675	stack_put (coro_stack *stack)	1072	static void NOINLINE
676	{
677	stack->next = stack_first;
678	stack_first = stack;
679	}
680
681	/* never call directly, always through the coro_state_transfer global variable */
682	static void
683	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	1073	transfer (pTHX_ struct coro *prev, struct coro *next)
684	{	1074	{
685	dSTACKLEVEL;	1075	dSTACKLEVEL;
686		1076
687	/* sometimes transfer is only called to set idle_sp */	1077	/* sometimes transfer is only called to set idle_sp */
688	if (!prev->stack->idle_sp)	1078	if (expect_false (!next))
689	prev->stack->idle_sp = stacklevel;	1079	{
690		1080	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
691	LOCK;	1081	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
692
693	if (prev != next)
694	{	1082	}
695	coro_stack *prev_stack = prev->stack;	1083	else if (expect_true (prev != next))
		1084	{
		1085	coro_cctx *prev__cctx;
696		1086
697	/* possibly "free" the stack */	1087	if (expect_false (prev->flags & CF_NEW))
698	if (0 && prev_stack->idle_sp == stacklevel)
699	{	1088	{
700	stack_put (prev_stack);	1089	/* create a new empty context */
701	prev->stack = 0;	1090	Newz (0, prev->cctx, 1, coro_cctx);
		1091	prev->flags &= ~CF_NEW;
		1092	prev->flags |= CF_RUNNING;
702	}	1093	}
703		1094
704	if (next->mainstack)	1095	prev->flags &= ~CF_RUNNING;
		1096	next->flags |= CF_RUNNING;
		1097
		1098	LOCK;
		1099
		1100	if (expect_false (next->flags & CF_NEW))
705	{	1101	{
706	/* coroutine already started */	1102	/* need to start coroutine */
707	SAVE (prev, flags);	1103	next->flags &= ~CF_NEW;
708	LOAD (next);	1104	/* first get rid of the old state */
		1105	save_perl (aTHX_ prev);
		1106	/* setup coroutine call */
		1107	coro_setup (aTHX_ next);
709	}	1108	}
710	else	1109	else
711	{	1110	{
712	/* need to start coroutine */	1111	/* coroutine already started */
713	/* first get rid of the old state */	1112	save_perl (aTHX_ prev);
714	SAVE (prev, -1);	1113	load_perl (aTHX_ next);
715	/* setup coroutine call */
716	setup_coro (next);
717	/* need to change stack from main_stack to real one */
718	next->stack = 0;
719	}	1114	}
720		1115
721	if (!next->stack)	1116	prev__cctx = prev->cctx;
722	next->stack = stack_get ();
723		1117
724	if (prev_stack != next->stack)	1118	/* possibly "free" the cctx */
		1119	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1120	{
		1121	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1122	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1123
		1124	prev->cctx = 0;
		1125
		1126	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1127	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1128	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1129	next->cctx = cctx_get (aTHX);
		1130
		1131	cctx_put (prev__cctx);
		1132	}
		1133
		1134	++next->usecount;
		1135
		1136	if (expect_true (!next->cctx))
		1137	next->cctx = cctx_get (aTHX);
		1138
		1139	if (expect_false (prev__cctx != next->cctx))
		1140	{
		1141	prev__cctx->top_env = PL_top_env;
		1142	PL_top_env = next->cctx->top_env;
725	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	1143	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
726	}	1144	}
727		1145
728	transfer_tail ();	1146	free_coro_mortal (aTHX);
729	}	1147	UNLOCK;
730		1148
731	/* use this function pointer to call the above function */	1149	if (expect_false (prev->throw || next->throw))
732	/* this is done to increase chances of the compiler not inlining the call */	1150	{
733	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1151	struct coro *coro = SvSTATE (coro_current);
734		1152
		1153	if (coro->throw)
		1154	{
		1155	SV *exception = coro->throw;
		1156	coro->throw = 0;
		1157	sv_setsv (ERRSV, exception);
		1158	croak (0);
		1159	}
		1160	}
		1161	}
		1162	}
		1163
		1164	struct transfer_args
		1165	{
		1166	struct coro *prev, *next;
		1167	};
		1168
		1169	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1170	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1171
		1172	/** high level stuff ********************************************************/
		1173
735	static void	1174	static int
736	coro_state_destroy (struct coro *coro)	1175	coro_state_destroy (pTHX_ struct coro *coro)
737	{	1176	{
738	if (coro->refcnt--)	1177	if (coro->flags & CF_DESTROYED)
739	return;	1178	return 0;
		1179
		1180	coro->flags |= CF_DESTROYED;
		1181
		1182	if (coro->flags & CF_READY)
		1183	{
		1184	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1185	/* alternative: look through all ready queues and remove the coro */
		1186	LOCK;
		1187	--coro_nready;
		1188	UNLOCK;
		1189	}
		1190	else
		1191	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
740		1192
741	if (coro->mainstack && coro->mainstack != main_mainstack)	1193	if (coro->mainstack && coro->mainstack != main_mainstack)
742	{	1194	{
743	struct coro temp;	1195	struct coro temp;
744		1196
745	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1197	if (coro->flags & CF_RUNNING)
		1198	croak ("FATAL: tried to destroy currently running coroutine");
		1199
		1200	save_perl (aTHX_ &temp);
746	LOAD (aTHX_ coro);	1201	load_perl (aTHX_ coro);
747		1202
748	destroy_stacks (aTHX);	1203	coro_destroy (aTHX_ coro);
749		1204
750	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1205	load_perl (aTHX_ &temp);
751		1206
752	coro->mainstack = 0;	1207	coro->slot = 0;
753	}	1208	}
754		1209
755	stack_free (coro->stack);	1210	cctx_destroy (coro->cctx);
756	SvREFCNT_dec (coro->args);	1211	SvREFCNT_dec (coro->args);
757	Safefree (coro);	1212
		1213	if (coro->next) coro->next->prev = coro->prev;
		1214	if (coro->prev) coro->prev->next = coro->next;
		1215	if (coro == coro_first) coro_first = coro->next;
		1216
		1217	return 1;
758	}	1218	}
759		1219
760	static int	1220	static int
761	coro_state_clear (SV *sv, MAGIC *mg)	1221	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
762	{	1222	{
763	struct coro *coro = (struct coro *)mg->mg_ptr;	1223	struct coro *coro = (struct coro *)mg->mg_ptr;
764	mg->mg_ptr = 0;	1224	mg->mg_ptr = 0;
765		1225
		1226	coro->hv = 0;
		1227
		1228	if (--coro->refcnt < 0)
		1229	{
766	coro_state_destroy (coro);	1230	coro_state_destroy (aTHX_ coro);
		1231	Safefree (coro);
		1232	}
767		1233
768	return 0;	1234	return 0;
769	}	1235	}
770		1236
771	static int	1237	static int
772	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1238	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
773	{	1239	{
774	struct coro *coro = (struct coro *)mg->mg_ptr;	1240	struct coro *coro = (struct coro *)mg->mg_ptr;
775		1241
776	++coro->refcnt;	1242	++coro->refcnt;
777		1243
778	return 0;	1244	return 0;
779	}	1245	}
780		1246
781	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1247	static MGVTBL coro_state_vtbl = {
		1248	0, 0, 0, 0,
		1249	coro_state_free,
		1250	0,
		1251	#ifdef MGf_DUP
		1252	coro_state_dup,
		1253	#else
		1254	# define MGf_DUP 0
		1255	#endif
		1256	};
782		1257
783	static struct coro *
784	SvSTATE (SV *coro)
785	{
786	HV *stash;
787	MAGIC *mg;
788
789	if (SvROK (coro))
790	coro = SvRV (coro);
791
792	stash = SvSTASH (coro);
793	if (stash != coro_stash && stash != coro_state_stash)
794	{
795	/* very slow, but rare, check */
796	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
797	croak ("Coro::State object required");
798	}
799
800	mg = SvMAGIC (coro);
801	assert (mg->mg_type == PERL_MAGIC_ext);
802	return (struct coro *)mg->mg_ptr;
803	}
804
805	static void	1258	static void
		1259	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1260	{
		1261	ta->prev = SvSTATE (prev_sv);
		1262	ta->next = SvSTATE (next_sv);
		1263	TRANSFER_CHECK (*ta);
		1264	}
		1265
		1266	static void
806	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1267	api_transfer (SV *prev_sv, SV *next_sv)
807	{	1268	{
808	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1269	dTHX;
		1270	struct transfer_args ta;
		1271
		1272	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1273	TRANSFER (ta);
809	}	1274	}
810		1275
811	/** Coro ********************************************************************/	1276	/** Coro ********************************************************************/
812		1277
813	#define PRIO_MAX 3
814	#define PRIO_HIGH 1
815	#define PRIO_NORMAL 0
816	#define PRIO_LOW -1
817	#define PRIO_IDLE -3
818	#define PRIO_MIN -4
819
820	/* for Coro.pm */
821	static GV *coro_current, *coro_idle;
822	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
823	static int coro_nready;
824
825	static void	1278	static void
826	coro_enq (pTHX_ SV *sv)	1279	coro_enq (pTHX_ SV *coro_sv)
827	{	1280	{
828	int prio;
829
830	if (SvTYPE (sv) != SVt_PVHV)
831	croak ("Coro::ready tried to enqueue something that is not a coroutine");
832
833	prio = SvSTATE (sv)->prio;
834
835	av_push (coro_ready [prio - PRIO_MIN], sv);	1281	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
836	coro_nready++;
837	}	1282	}
838		1283
839	static SV *	1284	static SV *
840	coro_deq (pTHX_ int min_prio)	1285	coro_deq (pTHX_ int min_prio)
841	{	1286	{
…		…
845	if (min_prio < 0)	1290	if (min_prio < 0)
846	min_prio = 0;	1291	min_prio = 0;
847		1292
848	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1293	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
849	if (AvFILLp (coro_ready [prio]) >= 0)	1294	if (AvFILLp (coro_ready [prio]) >= 0)
850	{
851	coro_nready--;
852	return av_shift (coro_ready [prio]);	1295	return av_shift (coro_ready [prio]);
853	}
854		1296
855	return 0;	1297	return 0;
856	}	1298	}
857		1299
858	static void	1300	static int
859	api_ready (SV *coro)	1301	api_ready (SV *coro_sv)
860	{	1302	{
861	dTHX;	1303	dTHX;
		1304	struct coro *coro;
862		1305
863	if (SvROK (coro))	1306	if (SvROK (coro_sv))
864	coro = SvRV (coro);	1307	coro_sv = SvRV (coro_sv);
		1308
		1309	coro = SvSTATE (coro_sv);
		1310
		1311	if (coro->flags & CF_READY)
		1312	return 0;
		1313
		1314	coro->flags |= CF_READY;
865		1315
866	LOCK;	1316	LOCK;
867	coro_enq (aTHX_ SvREFCNT_inc (coro));	1317	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1318	++coro_nready;
868	UNLOCK;	1319	UNLOCK;
		1320
		1321	return 1;
		1322	}
		1323
		1324	static int
		1325	api_is_ready (SV *coro_sv)
		1326	{
		1327	dTHX;
		1328	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1329	}
		1330
		1331	static void
		1332	prepare_schedule (pTHX_ struct transfer_args *ta)
		1333	{
		1334	SV *prev_sv, *next_sv;
		1335
		1336	for (;;)
		1337	{
		1338	LOCK;
		1339	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1340
		1341	/* nothing to schedule: call the idle handler */
		1342	if (expect_false (!next_sv))
		1343	{
		1344	dSP;
		1345	UNLOCK;
		1346
		1347	ENTER;
		1348	SAVETMPS;
		1349
		1350	PUSHMARK (SP);
		1351	PUTBACK;
		1352	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1353
		1354	FREETMPS;
		1355	LEAVE;
		1356	continue;
		1357	}
		1358
		1359	ta->next = SvSTATE (next_sv);
		1360
		1361	/* cannot transfer to destroyed coros, skip and look for next */
		1362	if (expect_false (ta->next->flags & CF_DESTROYED))
		1363	{
		1364	UNLOCK;
		1365	SvREFCNT_dec (next_sv);
		1366	/* coro_nready is already taken care of by destroy */
		1367	continue;
		1368	}
		1369
		1370	--coro_nready;
		1371	UNLOCK;
		1372	break;
		1373	}
		1374
		1375	/* free this only after the transfer */
		1376	prev_sv = SvRV (coro_current);
		1377	ta->prev = SvSTATE (prev_sv);
		1378	TRANSFER_CHECK (*ta);
		1379	assert (ta->next->flags & CF_READY);
		1380	ta->next->flags &= ~CF_READY;
		1381	SvRV_set (coro_current, next_sv);
		1382
		1383	LOCK;
		1384	free_coro_mortal (aTHX);
		1385	coro_mortal = prev_sv;
		1386	UNLOCK;
		1387	}
		1388
		1389	static void
		1390	prepare_cede (pTHX_ struct transfer_args *ta)
		1391	{
		1392	api_ready (coro_current);
		1393	prepare_schedule (aTHX_ ta);
		1394	}
		1395
		1396	static int
		1397	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1398	{
		1399	if (coro_nready)
		1400	{
		1401	SV *prev = SvRV (coro_current);
		1402	prepare_schedule (aTHX_ ta);
		1403	api_ready (prev);
		1404	return 1;
		1405	}
		1406	else
		1407	return 0;
869	}	1408	}
870		1409
871	static void	1410	static void
872	api_schedule (void)	1411	api_schedule (void)
873	{	1412	{
874	dTHX;	1413	dTHX;
		1414	struct transfer_args ta;
875		1415
876	SV *prev, *next;	1416	prepare_schedule (aTHX_ &ta);
877	SV *current = GvSV (coro_current);	1417	TRANSFER (ta);
878
879	for (;;)
880	{
881	LOCK;
882
883	next = coro_deq (aTHX_ PRIO_MIN);
884
885	if (next)
886	break;
887
888	UNLOCK;
889
890	{
891	dSP;
892
893	ENTER;
894	SAVETMPS;
895
896	PUSHMARK (SP);
897	PUTBACK;
898	call_sv (GvSV (coro_idle), G_DISCARD);
899
900	FREETMPS;
901	LEAVE;
902	}
903	}
904
905	prev = SvRV (current);
906	SvRV (current) = next;
907
908	/* free this only after the transfer */
909	coro_mortal = prev;
910
911	UNLOCK;
912
913	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
914	}	1418	}
915		1419
916	static int coro_cede_self;
917
918	static void	1420	static int
919	api_cede (void)	1421	api_cede (void)
920	{	1422	{
921	dTHX;	1423	dTHX;
922	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1424	struct transfer_args ta;
923		1425
924	LOCK;	1426	prepare_cede (aTHX_ &ta);
925		1427
926	if (coro_cede_self)	1428	if (expect_true (ta.prev != ta.next))
927	{	1429	{
928	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];	1430	TRANSFER (ta);
929	av_unshift (runqueue, 1);	1431	return 1;
930	av_store (runqueue, 0, current);
931	coro_nready++;
932	coro_cede_self = 0;
933	}	1432	}
934	else	1433	else
935	coro_enq (aTHX_ current);	1434	return 0;
936
937	UNLOCK;
938
939	api_schedule ();
940	}	1435	}
941		1436
		1437	static int
		1438	api_cede_notself (void)
		1439	{
		1440	dTHX;
		1441	struct transfer_args ta;
		1442
		1443	if (prepare_cede_notself (aTHX_ &ta))
		1444	{
		1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
		1450	}
		1451
		1452	static void
		1453	api_trace (SV *coro_sv, int flags)
		1454	{
		1455	dTHX;
		1456	struct coro *coro = SvSTATE (coro_sv);
		1457
		1458	if (flags & CC_TRACE)
		1459	{
		1460	if (!coro->cctx)
		1461	coro->cctx = cctx_new ();
		1462	else if (!(coro->cctx->flags & CC_TRACE))
		1463	croak ("cannot enable tracing on coroutine with custom stack");
		1464
		1465	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1466	}
		1467	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1468	{
		1469	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1470
		1471	if (coro->flags & CF_RUNNING)
		1472	PL_runops = RUNOPS_DEFAULT;
		1473	else
		1474	coro->slot->runops = RUNOPS_DEFAULT;
		1475	}
		1476	}
		1477
942	MODULE = Coro::State PACKAGE = Coro::State	1478	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
943		1479
944	PROTOTYPES: DISABLE	1480	PROTOTYPES: DISABLE
945		1481
946	BOOT:	1482	BOOT:
947	{	1483	{
948	#ifdef USE_ITHREADS	1484	#ifdef USE_ITHREADS
949	MUTEX_INIT (&coro_mutex);	1485	MUTEX_INIT (&coro_mutex);
950	#endif	1486	#endif
951	BOOT_PAGESIZE;	1487	BOOT_PAGESIZE;
952		1488
		1489	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1490	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1491
		1492	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1493	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1494
		1495	if (!PL_diehook) PL_diehook = SvREFCNT_inc (sv_diehook);
		1496	if (!PL_warnhook) PL_warnhook = SvREFCNT_inc (sv_warnhook);
		1497
953	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1498	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
954		1499
955	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1500	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
956	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1501	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
957	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1502	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1503	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
958		1504
959	main_mainstack = PL_mainstack;	1505	main_mainstack = PL_mainstack;
		1506	main_top_env = PL_top_env;
		1507
		1508	while (main_top_env->je_prev)
		1509	main_top_env = main_top_env->je_prev;
960		1510
961	coroapi.ver = CORO_API_VERSION;	1511	coroapi.ver = CORO_API_VERSION;
962	coroapi.transfer = api_transfer;	1512	coroapi.transfer = api_transfer;
963
964	Newz (0, main_stack, 1, coro_stack);
965	main_stack->idle_sp = (void *)-1;
966		1513
967	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1514	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
968	}	1515	}
969		1516
970	SV *	1517	SV *
…		…
974	struct coro *coro;	1521	struct coro *coro;
975	HV *hv;	1522	HV *hv;
976	int i;	1523	int i;
977		1524
978	Newz (0, coro, 1, struct coro);	1525	Newz (0, coro, 1, struct coro);
979	coro->args = newAV ();	1526	coro->args = newAV ();
		1527	coro->flags = CF_NEW;
980		1528
		1529	if (coro_first) coro_first->prev = coro;
		1530	coro->next = coro_first;
		1531	coro_first = coro;
		1532
981	hv = newHV ();	1533	coro->hv = hv = newHV ();
982	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1534	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
983	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1535	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
984		1536
985	av_push (coro->args, newSVsv (RETVAL));	1537	av_extend (coro->args, items - 1);
986	for (i = 1; i < items; i++)	1538	for (i = 1; i < items; i++)
987	av_push (coro->args, newSVsv (ST (i)));	1539	av_push (coro->args, newSVsv (ST (i)));
988
989	coro->stack = main_stack;
990	/*coro->mainstack = 0; *//*actual work is done inside transfer */
991	/*coro->stack = 0;*/
992	}	1540	}
993	OUTPUT:	1541	OUTPUT:
994	RETVAL	1542	RETVAL
995		1543
		1544	# these not obviously related functions are all rolled into the same xs
		1545	# function to increase chances that they all will call transfer with the same
		1546	# stack offset
996	void	1547	void
997	transfer (prev, next, flags)	1548	_set_stacklevel (...)
998	SV *prev	1549	ALIAS:
999	SV *next	1550	Coro::State::transfer = 1
1000	int flags	1551	Coro::schedule = 2
		1552	Coro::cede = 3
		1553	Coro::cede_notself = 4
1001	CODE:	1554	CODE:
1002	PUTBACK;
1003	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1004	SPAGAIN;
1005
1006	int
1007	prio (Coro::State coro, int newprio = 0)
1008	ALIAS:
1009	nice = 1
1010	CODE:
1011	{	1555	{
1012	RETVAL = coro->prio;	1556	struct transfer_args ta;
1013		1557
1014	if (items > 1)	1558	switch (ix)
1015	{	1559	{
		1560	case 0:
		1561	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1562	ta.next = 0;
		1563	break;
		1564
		1565	case 1:
1016	if (ix)	1566	if (items != 2)
1017	newprio += coro->prio;	1567	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1018		1568
1019	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1569	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1020	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1570	break;
1021		1571
1022	coro->prio = newprio;	1572	case 2:
		1573	prepare_schedule (aTHX_ &ta);
		1574	break;
		1575
		1576	case 3:
		1577	prepare_cede (aTHX_ &ta);
		1578	break;
		1579
		1580	case 4:
		1581	if (!prepare_cede_notself (aTHX_ &ta))
		1582	XSRETURN_EMPTY;
		1583
		1584	break;
1023	}	1585	}
1024	}
1025		1586
1026	void	1587	BARRIER;
1027	_clear_idle_sp (Coro::State self)	1588	TRANSFER (ta);
		1589
		1590	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1591	XSRETURN_YES;
		1592	}
		1593
		1594	bool
		1595	_destroy (SV *coro_sv)
1028	CODE:	1596	CODE:
1029	self->stack->idle_sp = 0;	1597	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1030		1598	OUTPUT:
1031	void	1599	RETVAL
1032	_clone_state_from (SV *dst, SV *src)
1033	CODE:
1034	{
1035	struct coro *coro_src = SvSTATE (src);
1036
1037	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1038
1039	++coro_src->refcnt;
1040	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1041	}
1042		1600
1043	void	1601	void
1044	_exit (code)	1602	_exit (code)
1045	int code	1603	int code
1046	PROTOTYPE: $	1604	PROTOTYPE: $
1047	CODE:	1605	CODE:
1048	_exit (code);	1606	_exit (code);
1049		1607
1050	MODULE = Coro::State PACKAGE = Coro::Cont	1608	int
		1609	cctx_stacksize (int new_stacksize = 0)
		1610	CODE:
		1611	RETVAL = coro_stacksize;
		1612	if (new_stacksize)
		1613	coro_stacksize = new_stacksize;
		1614	OUTPUT:
		1615	RETVAL
		1616
		1617	int
		1618	cctx_count ()
		1619	CODE:
		1620	RETVAL = cctx_count;
		1621	OUTPUT:
		1622	RETVAL
		1623
		1624	int
		1625	cctx_idle ()
		1626	CODE:
		1627	RETVAL = cctx_idle;
		1628	OUTPUT:
		1629	RETVAL
1051		1630
1052	void	1631	void
1053	yield (...)	1632	list ()
1054	PROTOTYPE: @	1633	PPCODE:
		1634	{
		1635	struct coro *coro;
		1636	for (coro = coro_first; coro; coro = coro->next)
		1637	if (coro->hv)
		1638	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1639	}
		1640
		1641	void
		1642	call (Coro::State coro, SV *coderef)
		1643	ALIAS:
		1644	eval = 1
		1645	CODE:
		1646	{
		1647	if (coro->mainstack)
		1648	{
		1649	struct coro temp;
		1650
		1651	if (!(coro->flags & CF_RUNNING))
		1652	{
		1653	save_perl (aTHX_ &temp);
		1654	load_perl (aTHX_ coro);
		1655	}
		1656
		1657	{
		1658	dSP;
		1659	ENTER;
		1660	SAVETMPS;
		1661	PUSHMARK (SP);
		1662	PUTBACK;
		1663
		1664	if (ix)
		1665	eval_sv (coderef, 0);
		1666	else
		1667	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1668
		1669	SPAGAIN;
		1670	FREETMPS;
		1671	LEAVE;
		1672	PUTBACK;
		1673	}
		1674
		1675	if (!(coro->flags & CF_RUNNING))
		1676	{
		1677	save_perl (aTHX_ coro);
		1678	load_perl (aTHX_ &temp);
		1679	}
		1680	}
		1681	}
		1682
		1683	SV *
		1684	is_ready (Coro::State coro)
		1685	PROTOTYPE: $
		1686	ALIAS:
		1687	is_ready = CF_READY
		1688	is_running = CF_RUNNING
		1689	is_new = CF_NEW
		1690	is_destroyed = CF_DESTROYED
		1691	CODE:
		1692	RETVAL = boolSV (coro->flags & ix);
		1693	OUTPUT:
		1694	RETVAL
		1695
		1696	void
		1697	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1698
		1699	SV *
		1700	has_stack (Coro::State coro)
		1701	PROTOTYPE: $
		1702	CODE:
		1703	RETVAL = boolSV (!!coro->cctx);
		1704	OUTPUT:
		1705	RETVAL
		1706
		1707	int
		1708	is_traced (Coro::State coro)
		1709	PROTOTYPE: $
		1710	CODE:
		1711	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1712	OUTPUT:
		1713	RETVAL
		1714
		1715	IV
		1716	rss (Coro::State coro)
		1717	PROTOTYPE: $
		1718	ALIAS:
		1719	usecount = 1
1055	CODE:	1720	CODE:
1056	{	1721	switch (ix)
1057	SV *yieldstack;	1722	{
1058	SV *sv;	1723	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1059	AV *defav = GvAV (PL_defgv);	1724	case 1: RETVAL = coro->usecount; break;
1060	struct coro *prev, *next;
1061
1062	yieldstack = *hv_fetch (
1063	(HV *)SvRV (GvSV (coro_current)),
1064	"yieldstack", sizeof ("yieldstack") - 1,
1065	0	1725	}
1066	);	1726	OUTPUT:
		1727	RETVAL
1067		1728
1068	/* set up @_ -- ugly */
1069	av_clear (defav);
1070	av_fill (defav, items - 1);
1071	while (items--)
1072	av_store (defav, items, SvREFCNT_inc (ST(items)));
1073
1074	sv = av_pop ((AV *)SvRV (yieldstack));
1075	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1076	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1077	SvREFCNT_dec (sv);
1078
1079	coro_state_transfer (aTHX_ prev, next, 0);
1080	}
1081		1729
1082	MODULE = Coro::State PACKAGE = Coro	1730	MODULE = Coro::State PACKAGE = Coro
1083		1731
1084	BOOT:	1732	BOOT:
1085	{	1733	{
1086	int i;	1734	int i;
1087		1735
		1736	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1737	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1738	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1739
		1740	coro_current = coro_get_sv ("Coro::current", FALSE);
		1741	SvREADONLY_on (coro_current);
		1742
1088	coro_stash = gv_stashpv ("Coro", TRUE);	1743	coro_stash = gv_stashpv ("Coro", TRUE);
1089		1744
1090	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1745	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1091	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1746	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1092	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1747	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1093	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1748	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1094	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1749	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1095	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1750	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1096		1751
1097	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1098	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1099
1100	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1752	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1101	coro_ready[i] = newAV ();	1753	coro_ready[i] = newAV ();
1102		1754
1103	{	1755	{
1104	SV *sv = perl_get_sv("Coro::API", 1);	1756	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1757	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1105		1758
1106	coroapi.schedule = api_schedule;	1759	coroapi.schedule = api_schedule;
1107	coroapi.cede = api_cede;	1760	coroapi.cede = api_cede;
		1761	coroapi.cede_notself = api_cede_notself;
1108	coroapi.ready = api_ready;	1762	coroapi.ready = api_ready;
		1763	coroapi.is_ready = api_is_ready;
1109	coroapi.nready = &coro_nready;	1764	coroapi.nready = &coro_nready;
1110	coroapi.current = coro_current;	1765	coroapi.current = coro_current;
1111		1766
1112	GCoroAPI = &coroapi;	1767	GCoroAPI = &coroapi;
1113	sv_setiv (sv, (IV)&coroapi);	1768	sv_setiv (sv, (IV)&coroapi);
1114	SvREADONLY_on (sv);	1769	SvREADONLY_on (sv);
1115	}	1770	}
1116	}	1771	}
1117		1772
1118	void	1773	void
		1774	_set_current (SV *current)
		1775	PROTOTYPE: $
		1776	CODE:
		1777	SvREFCNT_dec (SvRV (coro_current));
		1778	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1779
		1780	int
		1781	prio (Coro::State coro, int newprio = 0)
		1782	ALIAS:
		1783	nice = 1
		1784	CODE:
		1785	{
		1786	RETVAL = coro->prio;
		1787
		1788	if (items > 1)
		1789	{
		1790	if (ix)
		1791	newprio = coro->prio - newprio;
		1792
		1793	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1794	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1795
		1796	coro->prio = newprio;
		1797	}
		1798	}
		1799	OUTPUT:
		1800	RETVAL
		1801
		1802	SV *
1119	ready (SV *self)	1803	ready (SV *self)
1120	PROTOTYPE: $	1804	PROTOTYPE: $
1121	CODE:	1805	CODE:
1122	api_ready (self);	1806	RETVAL = boolSV (api_ready (self));
		1807	OUTPUT:
		1808	RETVAL
1123		1809
1124	int	1810	int
1125	nready (...)	1811	nready (...)
1126	PROTOTYPE:	1812	PROTOTYPE:
1127	CODE:	1813	CODE:
1128	RETVAL = coro_nready;	1814	RETVAL = coro_nready;
1129	OUTPUT:	1815	OUTPUT:
1130	RETVAL	1816	RETVAL
1131		1817
1132	void	1818	void
1133	schedule (...)	1819	throw (Coro::State self, SV *throw = &PL_sv_undef)
1134	PROTOTYPE:	1820	PROTOTYPE: $;$
		1821	CODE:
		1822	SvREFCNT_dec (self->throw);
		1823	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1824
		1825	# for async_pool speedup
		1826	void
		1827	_pool_1 (SV *cb)
1135	CODE:	1828	CODE:
1136	api_schedule ();	1829	{
		1830	struct coro *coro = SvSTATE (coro_current);
		1831	HV *hv = (HV *)SvRV (coro_current);
		1832	AV *defav = GvAV (PL_defgv);
		1833	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1834	AV *invoke_av;
		1835	int i, len;
		1836
		1837	if (!invoke)
		1838	croak ("\3async_pool terminate\2\n");
		1839
		1840	SvREFCNT_dec (coro->saved_deffh);
		1841	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1842
		1843	hv_store (hv, "desc", sizeof ("desc") - 1,
		1844	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1845
		1846	invoke_av = (AV *)SvRV (invoke);
		1847	len = av_len (invoke_av);
		1848
		1849	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1850
		1851	if (len > 0)
		1852	{
		1853	av_fill (defav, len - 1);
		1854	for (i = 0; i < len; ++i)
		1855	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1856	}
		1857
		1858	SvREFCNT_dec (invoke);
		1859	}
1137		1860
1138	void	1861	void
1139	_set_cede_self ()	1862	_pool_2 (SV *cb)
1140	CODE:	1863	CODE:
1141	coro_cede_self = 1;	1864	{
		1865	struct coro *coro = SvSTATE (coro_current);
1142		1866
1143	void	1867	sv_setsv (cb, &PL_sv_undef);
1144	cede (...)	1868
1145	PROTOTYPE:	1869	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1146	CODE:	1870	coro->saved_deffh = 0;
1147	api_cede ();	1871
		1872	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1873	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1874	croak ("\3async_pool terminate\2\n");
		1875
		1876	av_clear (GvAV (PL_defgv));
		1877	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1878	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1879
		1880	coro->prio = 0;
		1881
		1882	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1883	api_trace (coro_current, 0);
		1884
		1885	av_push (av_async_pool, newSVsv (coro_current));
		1886	}
		1887
1148		1888
1149	MODULE = Coro::State PACKAGE = Coro::AIO	1889	MODULE = Coro::State PACKAGE = Coro::AIO
1150		1890
1151	SV *	1891	SV *
1152	_get_state ()	1892	_get_state ()
1153	CODE:	1893	CODE:
1154	{	1894	{
1155	struct {	1895	struct io_state *data;
1156	int errorno;
1157	int laststype;
1158	int laststatval;
1159	Stat_t statcache;
1160	} data;
1161		1896
		1897	RETVAL = newSV (sizeof (struct io_state));
		1898	data = (struct io_state *)SvPVX (RETVAL);
		1899	SvCUR_set (RETVAL, sizeof (struct io_state));
		1900	SvPOK_only (RETVAL);
		1901
1162	data.errorno = errno;	1902	data->errorno = errno;
1163	data.laststype = PL_laststype;	1903	data->laststype = PL_laststype;
1164	data.laststatval = PL_laststatval;	1904	data->laststatval = PL_laststatval;
1165	data.statcache = PL_statcache;	1905	data->statcache = PL_statcache;
1166
1167	RETVAL = newSVpvn ((char *)&data, sizeof data);
1168	}	1906	}
1169	OUTPUT:	1907	OUTPUT:
1170	RETVAL	1908	RETVAL
1171		1909
1172	void	1910	void
1173	_set_state (char *data_)	1911	_set_state (char *data_)
1174	PROTOTYPE: $	1912	PROTOTYPE: $
1175	CODE:	1913	CODE:
1176	{	1914	{
1177	struct {	1915	struct io_state *data = (void *)data_;
1178	int errorno;
1179	int laststype;
1180	int laststatval;
1181	Stat_t statcache;
1182	} *data = (void *)data_;
1183		1916
1184	errno = data->errorno;	1917	errno = data->errorno;
1185	PL_laststype = data->laststype;	1918	PL_laststype = data->laststype;
1186	PL_laststatval = data->laststatval;	1919	PL_laststatval = data->laststatval;
1187	PL_statcache = data->statcache;	1920	PL_statcache = data->statcache;
1188	}	1921	}
		1922

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