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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.154 by root, Fri Sep 21 01:08:06 2007 UTC vs.
Revision 1.228 by root, Sun Apr 6 17:51:15 2008 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
2		2
3	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
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	#include <stdio.h>	12	#include <stdio.h>
12	#include <errno.h>	13	#include <errno.h>
13	#include <assert.h>	14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
14		16
15	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
16	# include <unistd.h>	18	# include <unistd.h>
17	# include <sys/mman.h>	19	# include <sys/mman.h>
18	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
…		…
70	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
71	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
72	# endif	74	# endif
73	#endif	75	#endif
74		76
		77	/* 5.8.8 */
		78	#ifndef GV_NOTQUAL
		79	# define GV_NOTQUAL 0
		80	#endif
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
		83	#endif
		84
		85	/* 5.11 */
		86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
		89
75	/* 5.8.7 */	90	/* 5.8.7 */
76	#ifndef SvRV_set	91	#ifndef SvRV_set
77	# define SvRV_set(s,v) SvRV(s) = (v)	92	# define SvRV_set(s,v) SvRV(s) = (v)
78	#endif	93	#endif
79		94
…		…
88	/* prefer perl internal functions over our own? */	103	/* prefer perl internal functions over our own? */
89	#ifndef CORO_PREFER_PERL_FUNCTIONS	104	#ifndef CORO_PREFER_PERL_FUNCTIONS
90	# define CORO_PREFER_PERL_FUNCTIONS 0	105	# define CORO_PREFER_PERL_FUNCTIONS 0
91	#endif	106	#endif
92		107
93	/* The next macro should declare a variable stacklevel that contains and approximation	108	/* The next macros try to return the current stack pointer, in an as
94	* to the current C stack pointer. Its property is that it changes with each call	109	* portable way as possible. */
95	* and should be unique. */
96	#define dSTACKLEVEL int stacklevel	110	#define dSTACKLEVEL volatile char stacklevel
97	#define STACKLEVEL ((void *)&stacklevel)	111	#define STACKLEVEL ((void *)&stacklevel)
98		112
99	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
100		114
101	#if __GNUC__ >= 3	115	#if __GNUC__ >= 3
102	# define attribute(x) __attribute__(x)	116	# define attribute(x) __attribute__(x)
103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
104	#else	119	#else
105	# define attribute(x)	120	# define attribute(x)
106	# define BARRIER	121	# define BARRIER
		122	# define expect(expr,value) (expr)
107	#endif	123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
108		127
109	#define NOINLINE attribute ((noinline))	128	#define NOINLINE attribute ((noinline))
110		129
111	#include "CoroAPI.h"	130	#include "CoroAPI.h"
112		131
…		…
131	static size_t coro_stacksize = CORO_STACKSIZE;	150	static size_t coro_stacksize = CORO_STACKSIZE;
132	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
133	static AV *main_mainstack; /* used to differentiate between $main and others */	152	static AV *main_mainstack; /* used to differentiate between $main and others */
134	static JMPENV *main_top_env;	153	static JMPENV *main_top_env;
135	static HV *coro_state_stash, *coro_stash;	154	static HV *coro_state_stash, *coro_stash;
136	static SV *coro_mortal; /* will be freed after next transfer */	155	static volatile SV *coro_mortal; /* will be freed after next transfer */
		156
		157	static GV *irsgv; /* $/ */
		158	static GV *stdoutgv; /* *STDOUT */
		159	static SV *rv_diehook;
		160	static SV *rv_warnhook;
		161	static HV *hv_sig; /* %SIG */
		162
		163	/* async_pool helper stuff */
		164	static SV *sv_pool_rss;
		165	static SV *sv_pool_size;
		166	static AV *av_async_pool;
137		167
138	static struct coro_cctx *cctx_first;	168	static struct coro_cctx *cctx_first;
139	static int cctx_count, cctx_idle;	169	static int cctx_count, cctx_idle;
		170
		171	enum {
		172	CC_MAPPED = 0x01,
		173	CC_NOREUSE = 0x02, /* throw this away after tracing */
		174	CC_TRACE = 0x04,
		175	CC_TRACE_SUB = 0x08, /* trace sub calls */
		176	CC_TRACE_LINE = 0x10, /* trace each statement */
		177	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		178	};
140		179
141	/* this is a structure representing a c-level coroutine */	180	/* this is a structure representing a c-level coroutine */
142	typedef struct coro_cctx {	181	typedef struct coro_cctx {
143	struct coro_cctx *next;	182	struct coro_cctx *next;
144		183
…		…
153	coro_context cctx;	192	coro_context cctx;
154		193
155	#if CORO_USE_VALGRIND	194	#if CORO_USE_VALGRIND
156	int valgrind_id;	195	int valgrind_id;
157	#endif	196	#endif
158	char inuse, mapped;	197	unsigned char flags;
159	} coro_cctx;	198	} coro_cctx;
160		199
161	enum {	200	enum {
162	CF_RUNNING = 0x0001, /* coroutine is running */	201	CF_RUNNING = 0x0001, /* coroutine is running */
163	CF_READY = 0x0002, /* coroutine is ready */	202	CF_READY = 0x0002, /* coroutine is ready */
164	CF_NEW = 0x0004, /* has never been switched to */	203	CF_NEW = 0x0004, /* has never been switched to */
165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
166	};	205	};
167		206
		207	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		208	typedef struct {
		209	SV *defsv;
		210	AV *defav;
		211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
		217
		218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		219
168	/* this is a structure representing a perl-level coroutine */	220	/* this is a structure representing a perl-level coroutine */
169	struct coro {	221	struct coro {
170	/* the c coroutine allocated to this perl coroutine, if any */	222	/* the c coroutine allocated to this perl coroutine, if any */
171	coro_cctx *cctx;	223	coro_cctx *cctx;
172		224
		225	/* process data */
		226	AV *mainstack;
		227	perl_slots *slot; /* basically the saved sp */
		228
173	/* data associated with this coroutine (initial args) */	229	AV *args; /* data associated with this coroutine (initial args) */
174	AV *args;	230	int refcnt; /* coroutines are refcounted, yes */
175	int refcnt;
176	int save; /* CORO_SAVE flags */
177	int flags; /* CF_ flags */	231	int flags; /* CF_ flags */
		232	HV *hv; /* the perl hash associated with this coro, if any */
178		233
179	/* optionally saved, might be zero */	234	/* statistics */
180	AV *defav; /* @_ */	235	int usecount; /* number of transfers to this coro */
181	SV *defsv; /* $_ */
182	SV *errsv; /* $@ */
183	GV *deffh; /* default filehandle */
184	SV *irssv; /* $/ */
185	SV *irssv_sv; /* real $/ cache */
186
187	#define VAR(name,type) type name;
188	# include "state.h"
189	#undef VAR
190		236
191	/* coro process data */	237	/* coro process data */
192	int prio;	238	int prio;
		239	SV *throw; /* exception to be thrown */
		240
		241	/* async_pool */
		242	SV *saved_deffh;
193		243
194	/* linked list */	244	/* linked list */
195	struct coro *next, *prev;	245	struct coro *next, *prev;
196	HV *hv; /* the perl hash associated with this coro, if any */
197	};	246	};
198		247
199	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
200	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
201		250
…		…
214	static int coro_nready;	263	static int coro_nready;
215	static struct coro *coro_first;	264	static struct coro *coro_first;
216		265
217	/** lowlevel stuff **********************************************************/	266	/** lowlevel stuff **********************************************************/
218		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
		270	{
		271	#if PERL_VERSION_ATLEAST (5,10,0)
		272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		273	get_sv (name, create);
		274	#endif
		275	return get_sv (name, create);
		276	}
		277
		278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,10,0)
		282	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		283	get_av (name, create);
		284	#endif
		285	return get_av (name, create);
		286	}
		287
		288	static HV *
		289	coro_get_hv (pTHX_ const char *name, int create)
		290	{
		291	#if PERL_VERSION_ATLEAST (5,10,0)
		292	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		293	get_hv (name, create);
		294	#endif
		295	return get_hv (name, create);
		296	}
		297
219	static AV *	298	static AV *
220	coro_clone_padlist (pTHX_ CV *cv)	299	coro_clone_padlist (pTHX_ CV *cv)
221	{	300	{
222	AV *padlist = CvPADLIST (cv);	301	AV *padlist = CvPADLIST (cv);
223	AV *newpadlist, *newpad;	302	AV *newpadlist, *newpad;
224		303
225	newpadlist = newAV ();	304	newpadlist = newAV ();
226	AvREAL_off (newpadlist);	305	AvREAL_off (newpadlist);
227	#if PERL_VERSION_ATLEAST (5,9,0)	306	#if PERL_VERSION_ATLEAST (5,10,0)
228	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	307	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
229	#else	308	#else
230	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	309	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
231	#endif	310	#endif
232	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	311	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
270		349
271	/* casting is fun. */	350	/* casting is fun. */
272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	351	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273	free_padlist (aTHX_ padlist);	352	free_padlist (aTHX_ padlist);
274		353
275	SvREFCNT_dec (av);
276
277	return 0;	354	return 0;
278	}	355	}
279		356
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		358	#define CORO_MAGIC_type_state PERL_MAGIC_ext
281		359
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	360	static MGVTBL coro_cv_vtbl = {
		361	0, 0, 0, 0,
		362	coro_cv_free
		363	};
283		364
284	#define CORO_MAGIC(cv) \	365	#define CORO_MAGIC(sv,type) \
285	SvMAGIC (cv) \	366	SvMAGIC (sv) \
286	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	367	? SvMAGIC (sv)->mg_type == type \
287	? SvMAGIC (cv) \	368	? SvMAGIC (sv) \
288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	369	: mg_find (sv, type) \
289	: 0	370	: 0
		371
		372	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		373	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		374
		375	static struct coro *
		376	SvSTATE_ (pTHX_ SV *coro)
		377	{
		378	HV *stash;
		379	MAGIC *mg;
		380
		381	if (SvROK (coro))
		382	coro = SvRV (coro);
		383
		384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		385	croak ("Coro::State object required");
		386
		387	stash = SvSTASH (coro);
		388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		389	{
		390	/* very slow, but rare, check */
		391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		392	croak ("Coro::State object required");
		393	}
		394
		395	mg = CORO_MAGIC_state (coro);
		396	return (struct coro *)mg->mg_ptr;
		397	}
		398
		399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
290		400
291	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
292	static void	402	static void
293	get_padlist (pTHX_ CV *cv)	403	get_padlist (pTHX_ CV *cv)
294	{	404	{
295	MAGIC *mg = CORO_MAGIC (cv);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
296	AV *av;	406	AV *av;
297		407
298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
300	else	410	else
301	{	411	{
302	#if CORO_PREFER_PERL_FUNCTIONS	412	#if CORO_PREFER_PERL_FUNCTIONS
303	/* this is probably cleaner, but also slower? */	413	/* this is probably cleaner, but also slower? */
…		…
312	}	422	}
313		423
314	static void	424	static void
315	put_padlist (pTHX_ CV *cv)	425	put_padlist (pTHX_ CV *cv)
316	{	426	{
317	MAGIC *mg = CORO_MAGIC (cv);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
318	AV *av;	428	AV *av;
319		429
320	if (!mg)	430	if (expect_false (!mg))
321	{	431	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
324	mg->mg_virtual = &vtbl_coro;
325	mg->mg_obj = (SV *)newAV ();
326	}
327		432
328	av = (AV *)mg->mg_obj;	433	av = (AV *)mg->mg_obj;
329		434
330	if (AvFILLp (av) >= AvMAX (av))	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
331	av_extend (av, AvMAX (av) + 1);	436	av_extend (av, AvMAX (av) + 1);
332		437
333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
334	}	439	}
335		440
336	/** load & save, init *******************************************************/	441	/** load & save, init *******************************************************/
337
338	#define SB do {
339	#define SE } while (0)
340
341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
342		442
343	static void	443	static void
344	load_perl (pTHX_ Coro__State c)	444	load_perl (pTHX_ Coro__State c)
345	{	445	{
		446	perl_slots *slot = c->slot;
		447	c->slot = 0;
		448
		449	PL_mainstack = c->mainstack;
		450
		451	GvSV (PL_defgv) = slot->defsv;
		452	GvAV (PL_defgv) = slot->defav;
		453	GvSV (PL_errgv) = slot->errsv;
		454	GvSV (irsgv) = slot->irsgv;
		455
346	#define VAR(name,type) PL_ ## name = c->name;	456	#define VAR(name,type) PL_ ## name = slot->name;
347	# include "state.h"	457	# include "state.h"
348	#undef VAR	458	#undef VAR
349
350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
353	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
354
355	if (c->irssv)
356	{
357	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
358	{
359	SvREFCNT_dec (c->irssv);
360	c->irssv = 0;
361	}
362	else
363	{
364	REPLACE_SV (PL_rs, c->irssv);
365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
366	sv_setsv (c->irssv_sv, PL_rs);
367	}
368	}
369		459
370	{	460	{
371	dSP;	461	dSP;
		462
372	CV *cv;	463	CV *cv;
373		464
374	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
375	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
376	{	467	{
377	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
378	CvDEPTH (cv) = PTR2IV (POPs);	469	CvDEPTH (cv) = PTR2IV (POPs);
379	CvPADLIST (cv) = (AV *)POPs;	470	CvPADLIST (cv) = (AV *)POPs;
380	}	471	}
…		…
395	/*	486	/*
396	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
397	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
398	*/	489	*/
399		490
400	EXTEND (SP, 3 + 1);
401	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
402	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
403	for (;;)	493	for (;;)
404	{	494	{
405	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
406	{	496	{
407	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
408		498
409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
410	{	500	{
411	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
412		502
413	if (CvDEPTH (cv))	503	if (expect_true (CvDEPTH (cv)))
414	{	504	{
415	EXTEND (SP, 3);	505	EXTEND (SP, 3);
416	PUSHs ((SV *)CvPADLIST (cv));	506	PUSHs ((SV *)CvPADLIST (cv));
417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
…		…
421	get_padlist (aTHX_ cv);	511	get_padlist (aTHX_ cv);
422	}	512	}
423	}	513	}
424	}	514	}
425		515
426	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
427	break;	517	break;
428		518
429	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
430	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
431	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
432	}	522	}
433		523
434	PUTBACK;	524	PUTBACK;
435	}	525	}
436		526
437	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
439	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
440	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;	530	if (SLOT_COUNT >= 2) CXINC;
441	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
442		538
		539	c->mainstack = PL_mainstack;
		540
		541	{
		542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		543
		544	slot->defav = GvAV (PL_defgv);
		545	slot->defsv = DEFSV;
		546	slot->errsv = ERRSV;
		547	slot->irsgv = GvSV (irsgv);
		548
443	#define VAR(name,type)c->name = PL_ ## name;	549	#define VAR(name,type) slot->name = PL_ ## name;
444	# include "state.h"	550	# include "state.h"
445	#undef VAR	551	#undef VAR
		552	}
446	}	553	}
447		554
448	/*	555	/*
449	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
450	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
…		…
455	# define coro_init_stacks init_stacks	562	# define coro_init_stacks init_stacks
456	#else	563	#else
457	static void	564	static void
458	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
459	{	566	{
460	PL_curstackinfo = new_stackinfo(64, 4);	567	PL_curstackinfo = new_stackinfo(32, 8);
461	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
462	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
464		571
465	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
466	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
468		575
469	New(50,PL_tmps_stack,64,SV*);	576	New(50,PL_tmps_stack,32,SV*);
470	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
471	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
472	PL_tmps_max = 64;	579	PL_tmps_max = 32;
473		580
474	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
475	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
476	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
477		584
478	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
479	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
480	#endif	587	#endif
481		588
482	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
483	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
484	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
485		592
486	New(54,PL_savestack,32,ANY);	593	New(54,PL_savestack,24,ANY);
487	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
488	PL_savestack_max = 32;	595	PL_savestack_max = 24;
489		596
490	#if !PERL_VERSION_ATLEAST (5,9,0)	597	#if !PERL_VERSION_ATLEAST (5,10,0)
491	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
492	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
493	PL_retstack_max = 8;	600	PL_retstack_max = 4;
494	#endif	601	#endif
495	}	602	}
496	#endif	603	#endif
497		604
498	/*	605	/*
499	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
500	*/	607	*/
501	static void	608	static void
502	coro_destroy_stacks (pTHX)	609	coro_destroy_stacks (pTHX)
503	{	610	{
504	if (!IN_DESTRUCT)
505	{
506	/* restore all saved variables and stuff */
507	LEAVE_SCOPE (0);
508	assert (PL_tmps_floor == -1);
509
510	/* free all temporaries */
511	FREETMPS;
512	assert (PL_tmps_ix == -1);
513
514	/* unwind all extra stacks */
515	POPSTACK_TO (PL_mainstack);
516
517	/* unwind main stack */
518	dounwind (-1);
519	}
520
521	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
522	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
523		613
524	while (PL_curstackinfo)	614	while (PL_curstackinfo)
525	{	615	{
…		…
535		625
536	Safefree (PL_tmps_stack);	626	Safefree (PL_tmps_stack);
537	Safefree (PL_markstack);	627	Safefree (PL_markstack);
538	Safefree (PL_scopestack);	628	Safefree (PL_scopestack);
539	Safefree (PL_savestack);	629	Safefree (PL_savestack);
540	#if !PERL_VERSION_ATLEAST (5,9,0)	630	#if !PERL_VERSION_ATLEAST (5,10,0)
541	Safefree (PL_retstack);	631	Safefree (PL_retstack);
542	#endif	632	#endif
543	}	633	}
544		634
545	static size_t	635	static size_t
546	coro_rss (struct coro *coro)	636	coro_rss (pTHX_ struct coro *coro)
547	{	637	{
548	size_t rss = sizeof (coro);	638	size_t rss = sizeof (*coro);
549		639
550	if (coro->mainstack)	640	if (coro->mainstack)
551	{	641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
552	if (coro->flags & CF_RUNNING)	645	if (coro->flags & CF_RUNNING)
553	{	646	{
		647	slot = &tmp_slot;
		648
554	#define VAR(name,type)coro->name = PL_ ## name;	649	#define VAR(name,type) slot->name = PL_ ## name;
555	# include "state.h"	650	# include "state.h"
556	#undef VAR	651	#undef VAR
557	}	652	}
		653	else
		654	slot = coro->slot;
558		655
559	rss += sizeof (coro->curstackinfo);	656	rss += sizeof (slot->curstackinfo);
560	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
561	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);	657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
562	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);	658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
563	rss += coro->tmps_max * sizeof (SV *);	659	rss += slot->tmps_max * sizeof (SV *);
564	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);	660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
565	rss += coro->scopestack_max * sizeof (I32);	661	rss += slot->scopestack_max * sizeof (I32);
566	rss += coro->savestack_max * sizeof (ANY);	662	rss += slot->savestack_max * sizeof (ANY);
567		663
568	#if !PERL_VERSION_ATLEAST (5,9,0)	664	#if !PERL_VERSION_ATLEAST (5,10,0)
569	rss += coro->retstack_max * sizeof (OP *);	665	rss += slot->retstack_max * sizeof (OP *);
570	#endif	666	#endif
571	}	667	}
572		668
573	return rss;	669	return rss;
574	}	670	}
575		671
576	/** coroutine stack handling ************************************************/	672	/** coroutine stack handling ************************************************/
577		673
		674	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		675	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
		713	{
		714	SV *old = *svp;
		715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
		718	}
		719	}
		720
		721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		722	}
		723
578	static void	724	static void
579	setup_coro (pTHX_ struct coro *coro)	725	coro_setup (pTHX_ struct coro *coro)
580	{	726	{
581	/*	727	/*
582	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
583	*/	729	*/
584	coro_init_stacks (aTHX);	730	coro_init_stacks (aTHX);
585		731
		732	PL_runops = RUNOPS_DEFAULT;
586	PL_curcop = &PL_compiling;	733	PL_curcop = &PL_compiling;
587	PL_in_eval = EVAL_NULL;	734	PL_in_eval = EVAL_NULL;
588	PL_comppad = 0;	735	PL_comppad = 0;
589	PL_curpm = 0;	736	PL_curpm = 0;
		737	PL_curpad = 0;
590	PL_localizing = 0;	738	PL_localizing = 0;
591	PL_dirty = 0;	739	PL_dirty = 0;
592	PL_restartop = 0;	740	PL_restartop = 0;
		741	#if !PERL_VERSION_ATLEAST (5,10,0)
		742	PL_parser = 0;
		743	#endif
		744
		745	/* recreate the die/warn hooks */
		746	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		747	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		748
		749	GvSV (PL_defgv) = newSV (0);
		750	GvAV (PL_defgv) = coro->args; coro->args = 0;
		751	GvSV (PL_errgv) = newSV (0);
		752	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		753	PL_rs = newSVsv (GvSV (irsgv));
		754	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
593		755
594	{	756	{
595	dSP;	757	dSP;
596	LOGOP myop;	758	LOGOP myop;
597		759
598	SvREFCNT_dec (GvAV (PL_defgv));
599	GvAV (PL_defgv) = coro->args; coro->args = 0;
600
601	Zero (&myop, 1, LOGOP);	760	Zero (&myop, 1, LOGOP);
602	myop.op_next = Nullop;	761	myop.op_next = Nullop;
603	myop.op_flags = OPf_WANT_VOID;	762	myop.op_flags = OPf_WANT_VOID;
604		763
605	PUSHMARK (SP);	764	PUSHMARK (SP);
606	XPUSHs (av_shift (GvAV (PL_defgv)));	765	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
607	PUTBACK;	766	PUTBACK;
608	PL_op = (OP *)&myop;	767	PL_op = (OP *)&myop;
609	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	768	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
610	SPAGAIN;	769	SPAGAIN;
611	}	770	}
612		771
613	ENTER; /* necessary e.g. for dounwind */	772	/* this newly created coroutine might be run on an existing cctx which most
		773	* likely was suspended in set_stacklevel, called from entersub.
		774	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		775	* so we ENTER here for symmetry
		776	*/
		777	ENTER;
		778	}
		779
		780	static void
		781	coro_destroy (pTHX_ struct coro *coro)
		782	{
		783	if (!IN_DESTRUCT)
		784	{
		785	/* restore all saved variables and stuff */
		786	LEAVE_SCOPE (0);
		787	assert (PL_tmps_floor == -1);
		788
		789	/* free all temporaries */
		790	FREETMPS;
		791	assert (PL_tmps_ix == -1);
		792
		793	/* unwind all extra stacks */
		794	POPSTACK_TO (PL_mainstack);
		795
		796	/* unwind main stack */
		797	dounwind (-1);
		798	}
		799
		800	SvREFCNT_dec (GvSV (PL_defgv));
		801	SvREFCNT_dec (GvAV (PL_defgv));
		802	SvREFCNT_dec (GvSV (PL_errgv));
		803	SvREFCNT_dec (PL_defoutgv);
		804	SvREFCNT_dec (PL_rs);
		805	SvREFCNT_dec (GvSV (irsgv));
		806
		807	SvREFCNT_dec (PL_diehook);
		808	SvREFCNT_dec (PL_warnhook);
		809
		810	SvREFCNT_dec (coro->saved_deffh);
		811	SvREFCNT_dec (coro->throw);
		812
		813	coro_destroy_stacks (aTHX);
614	}	814	}
615		815
616	static void	816	static void
617	free_coro_mortal (pTHX)	817	free_coro_mortal (pTHX)
618	{	818	{
619	if (coro_mortal)	819	if (expect_true (coro_mortal))
620	{	820	{
621	SvREFCNT_dec (coro_mortal);	821	SvREFCNT_dec (coro_mortal);
622	coro_mortal = 0;	822	coro_mortal = 0;
623	}	823	}
		824	}
		825
		826	static int
		827	runops_trace (pTHX)
		828	{
		829	COP *oldcop = 0;
		830	int oldcxix = -2;
		831	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		832	coro_cctx *cctx = coro->cctx;
		833
		834	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		835	{
		836	PERL_ASYNC_CHECK ();
		837
		838	if (cctx->flags & CC_TRACE_ALL)
		839	{
		840	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		841	{
		842	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		843	SV **bot, **top;
		844	AV *av = newAV (); /* return values */
		845	SV **cb;
		846	dSP;
		847
		848	GV *gv = CvGV (cx->blk_sub.cv);
		849	SV *fullname = sv_2mortal (newSV (0));
		850	if (isGV (gv))
		851	gv_efullname3 (fullname, gv, 0);
		852
		853	bot = PL_stack_base + cx->blk_oldsp + 1;
		854	top = cx->blk_gimme == G_ARRAY ? SP + 1
		855	: cx->blk_gimme == G_SCALAR ? bot + 1
		856	: bot;
		857
		858	av_extend (av, top - bot);
		859	while (bot < top)
		860	av_push (av, SvREFCNT_inc (*bot++));
		861
		862	PL_runops = RUNOPS_DEFAULT;
		863	ENTER;
		864	SAVETMPS;
		865	EXTEND (SP, 3);
		866	PUSHMARK (SP);
		867	PUSHs (&PL_sv_no);
		868	PUSHs (fullname);
		869	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		870	PUTBACK;
		871	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		872	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		873	SPAGAIN;
		874	FREETMPS;
		875	LEAVE;
		876	PL_runops = runops_trace;
		877	}
		878
		879	if (oldcop != PL_curcop)
		880	{
		881	oldcop = PL_curcop;
		882
		883	if (PL_curcop != &PL_compiling)
		884	{
		885	SV **cb;
		886
		887	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		888	{
		889	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		890
		891	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		892	{
		893	runops_proc_t old_runops = PL_runops;
		894	dSP;
		895	GV *gv = CvGV (cx->blk_sub.cv);
		896	SV *fullname = sv_2mortal (newSV (0));
		897
		898	if (isGV (gv))
		899	gv_efullname3 (fullname, gv, 0);
		900
		901	PL_runops = RUNOPS_DEFAULT;
		902	ENTER;
		903	SAVETMPS;
		904	EXTEND (SP, 3);
		905	PUSHMARK (SP);
		906	PUSHs (&PL_sv_yes);
		907	PUSHs (fullname);
		908	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		909	PUTBACK;
		910	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		911	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		912	SPAGAIN;
		913	FREETMPS;
		914	LEAVE;
		915	PL_runops = runops_trace;
		916	}
		917
		918	oldcxix = cxstack_ix;
		919	}
		920
		921	if (cctx->flags & CC_TRACE_LINE)
		922	{
		923	dSP;
		924
		925	PL_runops = RUNOPS_DEFAULT;
		926	ENTER;
		927	SAVETMPS;
		928	EXTEND (SP, 3);
		929	PL_runops = RUNOPS_DEFAULT;
		930	PUSHMARK (SP);
		931	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		932	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		933	PUTBACK;
		934	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		935	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		936	SPAGAIN;
		937	FREETMPS;
		938	LEAVE;
		939	PL_runops = runops_trace;
		940	}
		941	}
		942	}
		943	}
		944	}
		945
		946	TAINT_NOT;
		947	return 0;
624	}	948	}
625		949
626	/* inject a fake call to Coro::State::_cctx_init into the execution */	950	/* inject a fake call to Coro::State::_cctx_init into the execution */
627	/* _cctx_init should be careful, as it could be called at almost any time */	951	/* _cctx_init should be careful, as it could be called at almost any time */
628	/* during execution of a perl program */	952	/* during execution of a perl program */
629	static void NOINLINE	953	static void NOINLINE
630	prepare_cctx (pTHX_ coro_cctx *cctx)	954	cctx_prepare (pTHX_ coro_cctx *cctx)
631	{	955	{
632	dSP;	956	dSP;
633	LOGOP myop;	957	LOGOP myop;
		958
		959	PL_top_env = &PL_start_env;
		960
		961	if (cctx->flags & CC_TRACE)
		962	PL_runops = runops_trace;
634		963
635	Zero (&myop, 1, LOGOP);	964	Zero (&myop, 1, LOGOP);
636	myop.op_next = PL_op;	965	myop.op_next = PL_op;
637	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	966	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
638		967
…		…
648		977
649	/*	978	/*
650	* this is a _very_ stripped down perl interpreter ;)	979	* this is a _very_ stripped down perl interpreter ;)
651	*/	980	*/
652	static void	981	static void
653	coro_run (void *arg)	982	cctx_run (void *arg)
654	{	983	{
655	dTHX;	984	dTHX;
656		985
657	/* coro_run is the alternative tail of transfer(), so unlock here. */	986	/* cctx_run is the alternative tail of transfer(), so unlock here. */
658	UNLOCK;	987	UNLOCK;
659		988
660	PL_top_env = &PL_start_env;	989	/* we now skip the entersub that lead to transfer() */
		990	PL_op = PL_op->op_next;
661		991
662	/* inject a fake subroutine call to cctx_init */	992	/* inject a fake subroutine call to cctx_init */
663	prepare_cctx (aTHX_ (coro_cctx *)arg);	993	cctx_prepare (aTHX_ (coro_cctx *)arg);
664		994
665	/* somebody or something will hit me for both perl_run and PL_restartop */	995	/* somebody or something will hit me for both perl_run and PL_restartop */
666	PL_restartop = PL_op;	996	PL_restartop = PL_op;
667	perl_run (PL_curinterp);	997	perl_run (PL_curinterp);
668		998
…		…
687	++cctx_count;	1017	++cctx_count;
688		1018
689	Newz (0, cctx, 1, coro_cctx);	1019	Newz (0, cctx, 1, coro_cctx);
690		1020
691	#if HAVE_MMAP	1021	#if HAVE_MMAP
692
693	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1022	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
694	/* mmap supposedly does allocate-on-write for us */	1023	/* mmap supposedly does allocate-on-write for us */
695	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1024	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
696		1025
697	if (cctx->sptr != (void *)-1)	1026	if (cctx->sptr != (void *)-1)
…		…
699	# if CORO_STACKGUARD	1028	# if CORO_STACKGUARD
700	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1029	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
701	# endif	1030	# endif
702	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1031	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
703	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1032	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
704	cctx->mapped = 1;	1033	cctx->flags |= CC_MAPPED;
705	}	1034	}
706	else	1035	else
707	#endif	1036	#endif
708	{	1037	{
709	cctx->ssize = coro_stacksize * (long)sizeof (long);	1038	cctx->ssize = coro_stacksize * (long)sizeof (long);
…		…
718	stack_start = cctx->sptr;	1047	stack_start = cctx->sptr;
719	stack_size = cctx->ssize;	1048	stack_size = cctx->ssize;
720	}	1049	}
721		1050
722	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1051	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
723	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);	1052	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
724		1053
725	return cctx;	1054	return cctx;
726	}	1055	}
727		1056
728	static void	1057	static void
…		…
736	#if CORO_USE_VALGRIND	1065	#if CORO_USE_VALGRIND
737	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1066	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
738	#endif	1067	#endif
739		1068
740	#if HAVE_MMAP	1069	#if HAVE_MMAP
741	if (cctx->mapped)	1070	if (cctx->flags & CC_MAPPED)
742	munmap (cctx->sptr, cctx->ssize);	1071	munmap (cctx->sptr, cctx->ssize);
743	else	1072	else
744	#endif	1073	#endif
745	Safefree (cctx->sptr);	1074	Safefree (cctx->sptr);
746		1075
747	Safefree (cctx);	1076	Safefree (cctx);
748	}	1077	}
749		1078
		1079	/* wether this cctx should be destructed */
		1080	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1081
750	static coro_cctx *	1082	static coro_cctx *
751	cctx_get (pTHX)	1083	cctx_get (pTHX)
752	{	1084	{
753	while (cctx_first)	1085	while (expect_true (cctx_first))
754	{	1086	{
755	coro_cctx *cctx = cctx_first;	1087	coro_cctx *cctx = cctx_first;
756	cctx_first = cctx->next;	1088	cctx_first = cctx->next;
757	--cctx_idle;	1089	--cctx_idle;
758		1090
759	if (cctx->ssize >= coro_stacksize)	1091	if (expect_true (!CCTX_EXPIRED (cctx)))
760	return cctx;	1092	return cctx;
761		1093
762	cctx_destroy (cctx);	1094	cctx_destroy (cctx);
763	}	1095	}
764		1096
765	PL_op = PL_op->op_next;
766	return cctx_new ();	1097	return cctx_new ();
767	}	1098	}
768		1099
769	static void	1100	static void
770	cctx_put (coro_cctx *cctx)	1101	cctx_put (coro_cctx *cctx)
771	{	1102	{
772	/* free another cctx if overlimit */	1103	/* free another cctx if overlimit */
773	if (cctx_idle >= MAX_IDLE_CCTX)	1104	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
774	{	1105	{
775	coro_cctx *first = cctx_first;	1106	coro_cctx *first = cctx_first;
776	cctx_first = first->next;	1107	cctx_first = first->next;
777	--cctx_idle;	1108	--cctx_idle;
778		1109
779	assert (!first->inuse);
780	cctx_destroy (first);	1110	cctx_destroy (first);
781	}	1111	}
782		1112
783	++cctx_idle;	1113	++cctx_idle;
784	cctx->next = cctx_first;	1114	cctx->next = cctx_first;
785	cctx_first = cctx;	1115	cctx_first = cctx;
786	}	1116	}
787		1117
788	/** coroutine switching *****************************************************/	1118	/** coroutine switching *****************************************************/
789		1119
790	/* never call directly, always through the coro_state_transfer global variable */	1120	static void
		1121	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1122	{
		1123	if (expect_true (prev != next))
		1124	{
		1125	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1126	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1127
		1128	if (expect_false (next->flags & CF_RUNNING))
		1129	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1130
		1131	if (expect_false (next->flags & CF_DESTROYED))
		1132	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1133
		1134	#if !PERL_VERSION_ATLEAST (5,10,0)
		1135	if (expect_false (PL_lex_state != LEX_NOTPARSING)
		1136	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1137	#endif
		1138	}
		1139	}
		1140
		1141	/* always use the TRANSFER macro */
791	static void NOINLINE	1142	static void NOINLINE
792	transfer (pTHX_ struct coro *prev, struct coro *next)	1143	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
793	{	1144	{
794	dSTACKLEVEL;	1145	dSTACKLEVEL;
		1146	static volatile int has_throw;
795		1147
796	/* sometimes transfer is only called to set idle_sp */	1148	/* sometimes transfer is only called to set idle_sp */
797	if (!next)	1149	if (expect_false (!next))
798	{	1150	{
799	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1151	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
800	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1152	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
801	}	1153	}
802	else if (prev != next)	1154	else if (expect_true (prev != next))
803	{	1155	{
804	coro_cctx *prev__cctx;	1156	coro_cctx *prev__cctx;
805		1157
806	if (prev->flags & CF_NEW)	1158	if (expect_false (prev->flags & CF_NEW))
807	{	1159	{
808	/* create a new empty context */	1160	/* create a new empty context */
809	Newz (0, prev->cctx, 1, coro_cctx);	1161	Newz (0, prev->cctx, 1, coro_cctx);
810	prev->cctx->inuse = 1;
811	prev->flags &= ~CF_NEW;	1162	prev->flags &= ~CF_NEW;
812	prev->flags |= CF_RUNNING;	1163	prev->flags |= CF_RUNNING;
813	}	1164	}
814		1165
815	/*TODO: must not croak here */
816	if (!prev->flags & CF_RUNNING)
817	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
818
819	if (next->flags & CF_RUNNING)
820	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
821
822	if (next->flags & CF_DESTROYED)
823	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
824
825	prev->flags &= ~CF_RUNNING;	1166	prev->flags &= ~CF_RUNNING;
826	next->flags |= CF_RUNNING;	1167	next->flags |= CF_RUNNING;
827		1168
828	LOCK;	1169	LOCK;
829		1170
		1171	/* first get rid of the old state */
		1172	save_perl (aTHX_ prev);
		1173
830	if (next->flags & CF_NEW)	1174	if (expect_false (next->flags & CF_NEW))
831	{	1175	{
832	/* need to start coroutine */	1176	/* need to start coroutine */
833	next->flags &= ~CF_NEW;	1177	next->flags &= ~CF_NEW;
834	/* first get rid of the old state */
835	save_perl (aTHX_ prev);
836	/* setup coroutine call */	1178	/* setup coroutine call */
837	setup_coro (aTHX_ next);	1179	coro_setup (aTHX_ next);
838	/* need a new stack */
839	assert (!next->cctx);
840	}	1180	}
841	else	1181	else
842	{
843	/* coroutine already started */
844	save_perl (aTHX_ prev);
845	load_perl (aTHX_ next);	1182	load_perl (aTHX_ next);
846	}
847		1183
848	prev__cctx = prev->cctx;	1184	prev__cctx = prev->cctx;
849		1185
850	/* possibly "free" the cctx */	1186	/* possibly "free" the cctx */
		1187	if (expect_true (
851	if (prev__cctx->idle_sp == STACKLEVEL)	1188	prev__cctx->idle_sp == STACKLEVEL
		1189	&& !(prev__cctx->flags & CC_TRACE)
		1190	&& !force_cctx
		1191	))
852	{	1192	{
853	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1193	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
854	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1194	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
855		1195
856	prev->cctx = 0;	1196	prev->cctx = 0;
857		1197
		1198	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1199	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1200	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1201	if (!next->cctx)
		1202	next->cctx = cctx_get (aTHX);
		1203
858	cctx_put (prev__cctx);	1204	cctx_put (prev__cctx);
859	prev__cctx->inuse = 0;
860	}	1205	}
861		1206
		1207	++next->usecount;
		1208
862	if (!next->cctx)	1209	if (expect_true (!next->cctx))
863	{
864	next->cctx = cctx_get (aTHX);	1210	next->cctx = cctx_get (aTHX);
865	assert (!next->cctx->inuse);
866	next->cctx->inuse = 1;
867	}
868		1211
		1212	has_throw = !!next->throw;
		1213
869	if (prev__cctx != next->cctx)	1214	if (expect_false (prev__cctx != next->cctx))
870	{	1215	{
871	prev__cctx->top_env = PL_top_env;	1216	prev__cctx->top_env = PL_top_env;
872	PL_top_env = next->cctx->top_env;	1217	PL_top_env = next->cctx->top_env;
873	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1218	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
874	}	1219	}
875		1220
876	free_coro_mortal (aTHX);	1221	free_coro_mortal (aTHX);
877	UNLOCK;	1222	UNLOCK;
		1223
		1224	if (expect_false (has_throw))
		1225	{
		1226	struct coro *coro = SvSTATE (coro_current);
		1227
		1228	if (coro->throw)
		1229	{
		1230	SV *exception = coro->throw;
		1231	coro->throw = 0;
		1232	sv_setsv (ERRSV, exception);
		1233	croak (0);
		1234	}
		1235	}
878	}	1236	}
879	}	1237	}
880		1238
881	struct transfer_args	1239	struct transfer_args
882	{	1240	{
883	struct coro *prev, *next;	1241	struct coro *prev, *next;
884	};	1242	};
885		1243
		1244	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
886	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)	1245	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
887		1246
888	/** high level stuff ********************************************************/	1247	/** high level stuff ********************************************************/
889		1248
890	static int	1249	static int
891	coro_state_destroy (pTHX_ struct coro *coro)	1250	coro_state_destroy (pTHX_ struct coro *coro)
…		…
908		1267
909	if (coro->mainstack && coro->mainstack != main_mainstack)	1268	if (coro->mainstack && coro->mainstack != main_mainstack)
910	{	1269	{
911	struct coro temp;	1270	struct coro temp;
912		1271
913	assert (!(coro->flags & CF_RUNNING));
914
915	Zero (&temp, 1, struct coro);
916	temp.save = CORO_SAVE_ALL;
917
918	if (coro->flags & CF_RUNNING)	1272	if (coro->flags & CF_RUNNING)
919	croak ("FATAL: tried to destroy currently running coroutine");	1273	croak ("FATAL: tried to destroy currently running coroutine");
920		1274
921	save_perl (aTHX_ &temp);	1275	save_perl (aTHX_ &temp);
922	load_perl (aTHX_ coro);	1276	load_perl (aTHX_ coro);
923		1277
924	coro_destroy_stacks (aTHX);	1278	coro_destroy (aTHX_ coro);
925		1279
926	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */	1280	load_perl (aTHX_ &temp);
927		1281
928	coro->mainstack = 0;	1282	coro->slot = 0;
929	}	1283	}
930		1284
931	cctx_destroy (coro->cctx);	1285	cctx_destroy (coro->cctx);
932	SvREFCNT_dec (coro->args);	1286	SvREFCNT_dec (coro->args);
933		1287
…		…
974	#else	1328	#else
975	# define MGf_DUP 0	1329	# define MGf_DUP 0
976	#endif	1330	#endif
977	};	1331	};
978		1332
979	static struct coro *
980	SvSTATE_ (pTHX_ SV *coro)
981	{
982	HV *stash;
983	MAGIC *mg;
984
985	if (SvROK (coro))
986	coro = SvRV (coro);
987
988	stash = SvSTASH (coro);
989	if (stash != coro_stash && stash != coro_state_stash)
990	{
991	/* very slow, but rare, check */
992	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
993	croak ("Coro::State object required");
994	}
995
996	mg = CORO_MAGIC (coro);
997	return (struct coro *)mg->mg_ptr;
998	}
999
1000	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1001
1002	static void	1333	static void
1003	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1334	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1004	{	1335	{
1005	ta->prev = SvSTATE (prev_sv);	1336	ta->prev = SvSTATE (prev_sv);
1006	ta->next = SvSTATE (next_sv);	1337	ta->next = SvSTATE (next_sv);
		1338	TRANSFER_CHECK (*ta);
1007	}	1339	}
1008		1340
1009	static void	1341	static void
1010	api_transfer (SV *prev_sv, SV *next_sv)	1342	api_transfer (SV *prev_sv, SV *next_sv)
1011	{	1343	{
1012	dTHX;	1344	dTHX;
1013	struct transfer_args ta;	1345	struct transfer_args ta;
1014		1346
1015	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1347	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1016	TRANSFER (ta);	1348	TRANSFER (ta, 1);
1017	}
1018
1019	static int
1020	api_save (SV *coro_sv, int new_save)
1021	{
1022	dTHX;
1023	struct coro *coro = SvSTATE (coro_sv);
1024	int old_save = coro->save;
1025
1026	if (new_save >= 0)
1027	coro->save = new_save;
1028
1029	return old_save;
1030	}	1349	}
1031		1350
1032	/** Coro ********************************************************************/	1351	/** Coro ********************************************************************/
1033		1352
1034	static void	1353	static void
…		…
1036	{	1355	{
1037	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1356	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1038	}	1357	}
1039		1358
1040	static SV *	1359	static SV *
1041	coro_deq (pTHX_ int min_prio)	1360	coro_deq (pTHX)
1042	{	1361	{
1043	int prio = PRIO_MAX - PRIO_MIN;	1362	int prio;
1044		1363
1045	min_prio -= PRIO_MIN;
1046	if (min_prio < 0)
1047	min_prio = 0;
1048
1049	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1364	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1050	if (AvFILLp (coro_ready [prio]) >= 0)	1365	if (AvFILLp (coro_ready [prio]) >= 0)
1051	return av_shift (coro_ready [prio]);	1366	return av_shift (coro_ready [prio]);
1052		1367
1053	return 0;	1368	return 0;
1054	}	1369	}
…		…
1090	SV *prev_sv, *next_sv;	1405	SV *prev_sv, *next_sv;
1091		1406
1092	for (;;)	1407	for (;;)
1093	{	1408	{
1094	LOCK;	1409	LOCK;
1095	next_sv = coro_deq (aTHX_ PRIO_MIN);	1410	next_sv = coro_deq (aTHX);
1096		1411
1097	/* nothing to schedule: call the idle handler */	1412	/* nothing to schedule: call the idle handler */
1098	if (!next_sv)	1413	if (expect_false (!next_sv))
1099	{	1414	{
1100	dSP;	1415	dSP;
1101	UNLOCK;	1416	UNLOCK;
1102		1417
1103	ENTER;	1418	ENTER;
1104	SAVETMPS;	1419	SAVETMPS;
1105		1420
1106	PUSHMARK (SP);	1421	PUSHMARK (SP);
1107	PUTBACK;	1422	PUTBACK;
1108	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1423	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1424	SPAGAIN;
1109		1425
1110	FREETMPS;	1426	FREETMPS;
1111	LEAVE;	1427	LEAVE;
1112	continue;	1428	continue;
1113	}	1429	}
1114		1430
1115	ta->next = SvSTATE (next_sv);	1431	ta->next = SvSTATE (next_sv);
1116		1432
1117	/* cannot transfer to destroyed coros, skip and look for next */	1433	/* cannot transfer to destroyed coros, skip and look for next */
1118	if (ta->next->flags & CF_DESTROYED)	1434	if (expect_false (ta->next->flags & CF_DESTROYED))
1119	{	1435	{
1120	UNLOCK;	1436	UNLOCK;
1121	SvREFCNT_dec (next_sv);	1437	SvREFCNT_dec (next_sv);
1122	/* coro_nready is already taken care of by destroy */	1438	/* coro_nready is already taken care of by destroy */
1123	continue;	1439	continue;
…		…
1128	break;	1444	break;
1129	}	1445	}
1130		1446
1131	/* free this only after the transfer */	1447	/* free this only after the transfer */
1132	prev_sv = SvRV (coro_current);	1448	prev_sv = SvRV (coro_current);
1133	SvRV_set (coro_current, next_sv);
1134	ta->prev = SvSTATE (prev_sv);	1449	ta->prev = SvSTATE (prev_sv);
1135		1450	TRANSFER_CHECK (*ta);
1136	assert (ta->next->flags & CF_READY);	1451	assert (ta->next->flags & CF_READY);
1137	ta->next->flags &= ~CF_READY;	1452	ta->next->flags &= ~CF_READY;
		1453	SvRV_set (coro_current, next_sv);
1138		1454
1139	LOCK;	1455	LOCK;
1140	free_coro_mortal (aTHX);	1456	free_coro_mortal (aTHX);
1141	coro_mortal = prev_sv;	1457	coro_mortal = prev_sv;
1142	UNLOCK;	1458	UNLOCK;
…		…
1168	{	1484	{
1169	dTHX;	1485	dTHX;
1170	struct transfer_args ta;	1486	struct transfer_args ta;
1171		1487
1172	prepare_schedule (aTHX_ &ta);	1488	prepare_schedule (aTHX_ &ta);
1173	TRANSFER (ta);	1489	TRANSFER (ta, 1);
1174	}	1490	}
1175		1491
1176	static int	1492	static int
1177	api_cede (void)	1493	api_cede (void)
1178	{	1494	{
1179	dTHX;	1495	dTHX;
1180	struct transfer_args ta;	1496	struct transfer_args ta;
1181		1497
1182	prepare_cede (aTHX_ &ta);	1498	prepare_cede (aTHX_ &ta);
1183		1499
1184	if (ta.prev != ta.next)	1500	if (expect_true (ta.prev != ta.next))
1185	{	1501	{
1186	TRANSFER (ta);	1502	TRANSFER (ta, 1);
1187	return 1;	1503	return 1;
1188	}	1504	}
1189	else	1505	else
1190	return 0;	1506	return 0;
1191	}	1507	}
…		…
1196	dTHX;	1512	dTHX;
1197	struct transfer_args ta;	1513	struct transfer_args ta;
1198		1514
1199	if (prepare_cede_notself (aTHX_ &ta))	1515	if (prepare_cede_notself (aTHX_ &ta))
1200	{	1516	{
1201	TRANSFER (ta);	1517	TRANSFER (ta, 1);
1202	return 1;	1518	return 1;
1203	}	1519	}
1204	else	1520	else
1205	return 0;	1521	return 0;
1206	}	1522	}
1207		1523
		1524	static void
		1525	api_trace (SV *coro_sv, int flags)
		1526	{
		1527	dTHX;
		1528	struct coro *coro = SvSTATE (coro_sv);
		1529
		1530	if (flags & CC_TRACE)
		1531	{
		1532	if (!coro->cctx)
		1533	coro->cctx = cctx_new ();
		1534	else if (!(coro->cctx->flags & CC_TRACE))
		1535	croak ("cannot enable tracing on coroutine with custom stack");
		1536
		1537	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1538	}
		1539	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1540	{
		1541	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1542
		1543	if (coro->flags & CF_RUNNING)
		1544	PL_runops = RUNOPS_DEFAULT;
		1545	else
		1546	coro->slot->runops = RUNOPS_DEFAULT;
		1547	}
		1548	}
		1549
1208	MODULE = Coro::State PACKAGE = Coro::State	1550	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1209		1551
1210	PROTOTYPES: DISABLE	1552	PROTOTYPES: DISABLE
1211		1553
1212	BOOT:	1554	BOOT:
1213	{	1555	{
1214	#ifdef USE_ITHREADS	1556	#ifdef USE_ITHREADS
1215	MUTEX_INIT (&coro_mutex);	1557	MUTEX_INIT (&coro_mutex);
1216	#endif	1558	#endif
1217	BOOT_PAGESIZE;	1559	BOOT_PAGESIZE;
1218		1560
		1561	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1562	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1563
		1564	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1565	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1566	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1567	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1568
		1569	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1570	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1571	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1572
1219	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1573	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1220		1574
1221	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1575	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1222	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));	1576	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1223	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1224	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1225	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1226	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));	1577	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1227	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1578	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1228		1579
1229	main_mainstack = PL_mainstack;	1580	main_mainstack = PL_mainstack;
1230	main_top_env = PL_top_env;	1581	main_top_env = PL_top_env;
1231		1582
1232	while (main_top_env->je_prev)	1583	while (main_top_env->je_prev)
1233	main_top_env = main_top_env->je_prev;	1584	main_top_env = main_top_env->je_prev;
1234		1585
1235	coroapi.ver = CORO_API_VERSION;	1586	coroapi.ver = CORO_API_VERSION;
		1587	coroapi.rev = CORO_API_REVISION;
1236	coroapi.transfer = api_transfer;	1588	coroapi.transfer = api_transfer;
1237		1589
1238	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1590	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1239	}	1591	}
1240		1592
1241	SV *	1593	SV *
1242	new (char *klass, ...)	1594	new (char *klass, ...)
1243	CODE:	1595	CODE:
1244	{	1596	{
1245	struct coro *coro;	1597	struct coro *coro;
		1598	MAGIC *mg;
1246	HV *hv;	1599	HV *hv;
1247	int i;	1600	int i;
1248		1601
1249	Newz (0, coro, 1, struct coro);	1602	Newz (0, coro, 1, struct coro);
1250	coro->args = newAV ();	1603	coro->args = newAV ();
1251	coro->save = CORO_SAVE_DEF;
1252	coro->flags = CF_NEW;	1604	coro->flags = CF_NEW;
1253		1605
1254	if (coro_first) coro_first->prev = coro;	1606	if (coro_first) coro_first->prev = coro;
1255	coro->next = coro_first;	1607	coro->next = coro_first;
1256	coro_first = coro;	1608	coro_first = coro;
1257		1609
1258	coro->hv = hv = newHV ();	1610	coro->hv = hv = newHV ();
1259	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1611	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1612	mg->mg_flags |= MGf_DUP;
1260	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1613	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1261		1614
		1615	av_extend (coro->args, items - 1);
1262	for (i = 1; i < items; i++)	1616	for (i = 1; i < items; i++)
1263	av_push (coro->args, newSVsv (ST (i)));	1617	av_push (coro->args, newSVsv (ST (i)));
1264	}	1618	}
1265	OUTPUT:	1619	OUTPUT:
1266	RETVAL	1620	RETVAL
1267		1621
1268	int	1622	# these not obviously related functions are all rolled into the same xs
1269	save (SV *coro, int new_save = -1)	1623	# function to increase chances that they all will call transfer with the same
1270	CODE:	1624	# stack offset
1271	RETVAL = api_save (coro, new_save);
1272	OUTPUT:
1273	RETVAL
1274
1275	int
1276	save_also (SV *coro_sv, int save_also)
1277	CODE:
1278	{
1279	struct coro *coro = SvSTATE (coro_sv);
1280	RETVAL = coro->save;
1281	coro->save |= save_also;
1282	}
1283	OUTPUT:
1284	RETVAL
1285
1286	void	1625	void
1287	_set_stacklevel (...)	1626	_set_stacklevel (...)
1288	ALIAS:	1627	ALIAS:
1289	Coro::State::transfer = 1	1628	Coro::State::transfer = 1
1290	Coro::schedule = 2	1629	Coro::schedule = 2
…		…
1292	Coro::cede_notself = 4	1631	Coro::cede_notself = 4
1293	CODE:	1632	CODE:
1294	{	1633	{
1295	struct transfer_args ta;	1634	struct transfer_args ta;
1296		1635
		1636	PUTBACK;
1297	switch (ix)	1637	switch (ix)
1298	{	1638	{
1299	case 0:	1639	case 0:
1300	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1640	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1301	ta.next = 0;	1641	ta.next = 0;
…		…
1320	if (!prepare_cede_notself (aTHX_ &ta))	1660	if (!prepare_cede_notself (aTHX_ &ta))
1321	XSRETURN_EMPTY;	1661	XSRETURN_EMPTY;
1322		1662
1323	break;	1663	break;
1324	}	1664	}
		1665	SPAGAIN;
1325		1666
1326	BARRIER;	1667	BARRIER;
		1668	PUTBACK;
1327	TRANSFER (ta);	1669	TRANSFER (ta, 0);
1328		1670	SPAGAIN; /* might be the sp of a different coroutine now */
1329	if (GIMME_V != G_VOID && ta.next != ta.prev)	1671	/* be extra careful not to ever do anything after TRANSFER */
1330	XSRETURN_YES;
1331	}	1672	}
1332		1673
1333	bool	1674	bool
1334	_destroy (SV *coro_sv)	1675	_destroy (SV *coro_sv)
1335	CODE:	1676	CODE:
…		…
1376	if (coro->hv)	1717	if (coro->hv)
1377	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));	1718	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1378	}	1719	}
1379		1720
1380	void	1721	void
1381	_eval (Coro::State coro, SV *coderef)	1722	call (Coro::State coro, SV *coderef)
		1723	ALIAS:
		1724	eval = 1
1382	CODE:	1725	CODE:
1383	{	1726	{
1384	if (coro->mainstack)	1727	if (coro->mainstack)
1385	{	1728	{
1386	struct coro temp;	1729	struct coro temp;
1387	Zero (&temp, 1, struct coro);
1388	temp.save = CORO_SAVE_ALL;
1389		1730
1390	if (!(coro->flags & CF_RUNNING))	1731	if (!(coro->flags & CF_RUNNING))
1391	{	1732	{
		1733	PUTBACK;
1392	save_perl (aTHX_ &temp);	1734	save_perl (aTHX_ &temp);
1393	load_perl (aTHX_ coro);	1735	load_perl (aTHX_ coro);
1394	}	1736	}
1395		1737
1396	{	1738	{
1397	dSP;	1739	dSP;
1398	ENTER;	1740	ENTER;
1399	SAVETMPS;	1741	SAVETMPS;
		1742	PUTBACK;
		1743	PUSHSTACK;
1400	PUSHMARK (SP);	1744	PUSHMARK (SP);
1401	PUTBACK;	1745
		1746	if (ix)
		1747	eval_sv (coderef, 0);
		1748	else
1402	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);	1749	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1750
		1751	POPSTACK;
1403	SPAGAIN;	1752	SPAGAIN;
1404	FREETMPS;	1753	FREETMPS;
1405	LEAVE;	1754	LEAVE;
1406	PUTBACK;	1755	PUTBACK;
1407	}	1756	}
1408		1757
1409	if (!(coro->flags & CF_RUNNING))	1758	if (!(coro->flags & CF_RUNNING))
1410	{	1759	{
1411	save_perl (aTHX_ coro);	1760	save_perl (aTHX_ coro);
1412	load_perl (aTHX_ &temp);	1761	load_perl (aTHX_ &temp);
		1762	SPAGAIN;
1413	}	1763	}
1414	}	1764	}
1415	}	1765	}
1416		1766
1417	SV *	1767	SV *
1418	is_ready (Coro::State coro)	1768	is_ready (Coro::State coro)
1419	PROTOTYPE: $	1769	PROTOTYPE: $
1420	ALIAS:	1770	ALIAS:
1421	is_ready = CF_READY	1771	is_ready = CF_READY
…		…
1425	CODE:	1775	CODE:
1426	RETVAL = boolSV (coro->flags & ix);	1776	RETVAL = boolSV (coro->flags & ix);
1427	OUTPUT:	1777	OUTPUT:
1428	RETVAL	1778	RETVAL
1429		1779
		1780	void
		1781	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1782
		1783	SV *
		1784	has_stack (Coro::State coro)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	RETVAL = boolSV (!!coro->cctx);
		1788	OUTPUT:
		1789	RETVAL
		1790
		1791	int
		1792	is_traced (Coro::State coro)
		1793	PROTOTYPE: $
		1794	CODE:
		1795	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1796	OUTPUT:
		1797	RETVAL
		1798
1430	IV	1799	IV
1431	rss (Coro::State coro)	1800	rss (Coro::State coro)
1432	PROTOTYPE: $	1801	PROTOTYPE: $
		1802	ALIAS:
		1803	usecount = 1
1433	CODE:	1804	CODE:
1434	RETVAL = coro_rss (coro);	1805	switch (ix)
		1806	{
		1807	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1808	case 1: RETVAL = coro->usecount; break;
		1809	}
1435	OUTPUT:	1810	OUTPUT:
1436	RETVAL	1811	RETVAL
1437		1812
		1813	void
		1814	force_cctx ()
		1815	CODE:
		1816	struct coro *coro = SvSTATE (coro_current);
		1817	coro->cctx->idle_sp = 0;
1438		1818
1439	MODULE = Coro::State PACKAGE = Coro	1819	MODULE = Coro::State PACKAGE = Coro
1440		1820
1441	BOOT:	1821	BOOT:
1442	{	1822	{
1443	int i;	1823	int i;
1444		1824
		1825	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1826	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1827	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1828
		1829	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1830	SvREADONLY_on (coro_current);
		1831
1445	coro_stash = gv_stashpv ("Coro", TRUE);	1832	coro_stash = gv_stashpv ("Coro", TRUE);
1446		1833
1447	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1834	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1448	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1835	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1449	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1836	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1450	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1837	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1451	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1838	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1452	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1839	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1453		1840
1454	coro_current = get_sv ("Coro::current", FALSE);
1455	SvREADONLY_on (coro_current);
1456
1457	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1841	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1458	coro_ready[i] = newAV ();	1842	coro_ready[i] = newAV ();
1459		1843
1460	{	1844	{
1461	SV *sv = perl_get_sv("Coro::API", 1);	1845	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1846	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1462		1847
1463	coroapi.schedule = api_schedule;	1848	coroapi.schedule = api_schedule;
1464	coroapi.save = api_save;
1465	coroapi.cede = api_cede;	1849	coroapi.cede = api_cede;
1466	coroapi.cede_notself = api_cede_notself;	1850	coroapi.cede_notself = api_cede_notself;
1467	coroapi.ready = api_ready;	1851	coroapi.ready = api_ready;
1468	coroapi.is_ready = api_is_ready;	1852	coroapi.is_ready = api_is_ready;
1469	coroapi.nready = &coro_nready;	1853	coroapi.nready = &coro_nready;
…		…
1518	CODE:	1902	CODE:
1519	RETVAL = coro_nready;	1903	RETVAL = coro_nready;
1520	OUTPUT:	1904	OUTPUT:
1521	RETVAL	1905	RETVAL
1522		1906
		1907	void
		1908	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1909	PROTOTYPE: $;$
		1910	CODE:
		1911	SvREFCNT_dec (self->throw);
		1912	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1913
		1914	void
		1915	swap_defsv (Coro::State self)
		1916	PROTOTYPE: $
		1917	ALIAS:
		1918	swap_defav = 1
		1919	CODE:
		1920	if (!self->slot)
		1921	croak ("cannot swap state with coroutine that has no saved state");
		1922	else
		1923	{
		1924	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1925	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1926
		1927	SV *tmp = *src; *src = *dst; *dst = tmp;
		1928	}
		1929
		1930	# for async_pool speedup
		1931	void
		1932	_pool_1 (SV *cb)
		1933	CODE:
		1934	{
		1935	struct coro *coro = SvSTATE (coro_current);
		1936	HV *hv = (HV *)SvRV (coro_current);
		1937	AV *defav = GvAV (PL_defgv);
		1938	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1939	AV *invoke_av;
		1940	int i, len;
		1941
		1942	if (!invoke)
		1943	{
		1944	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1945	croak ("\3async_pool terminate\2\n");
		1946	}
		1947
		1948	SvREFCNT_dec (coro->saved_deffh);
		1949	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1950
		1951	hv_store (hv, "desc", sizeof ("desc") - 1,
		1952	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1953
		1954	invoke_av = (AV *)SvRV (invoke);
		1955	len = av_len (invoke_av);
		1956
		1957	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1958
		1959	if (len > 0)
		1960	{
		1961	av_fill (defav, len - 1);
		1962	for (i = 0; i < len; ++i)
		1963	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1964	}
		1965
		1966	SvREFCNT_dec (invoke);
		1967	}
		1968
		1969	void
		1970	_pool_2 (SV *cb)
		1971	CODE:
		1972	{
		1973	struct coro *coro = SvSTATE (coro_current);
		1974
		1975	sv_setsv (cb, &PL_sv_undef);
		1976
		1977	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1978	coro->saved_deffh = 0;
		1979
		1980	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1981	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1982	{
		1983	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1984	croak ("\3async_pool terminate\2\n");
		1985	}
		1986
		1987	av_clear (GvAV (PL_defgv));
		1988	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1989	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1990
		1991	coro->prio = 0;
		1992
		1993	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1994	api_trace (coro_current, 0);
		1995
		1996	av_push (av_async_pool, newSVsv (coro_current));
		1997	}
		1998
		1999
1523	MODULE = Coro::State PACKAGE = Coro::AIO	2000	MODULE = Coro::State PACKAGE = Coro::AIO
1524		2001
1525	SV *	2002	SV *
1526	_get_state ()	2003	_get_state ()
1527	CODE:	2004	CODE:

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