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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.145 by root, Mon Mar 12 21:40:14 2007 UTC vs.
Revision 1.221 by root, Sun Jan 13 09:47:22 2008 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
9	#include <stdio.h>	12	#include <stdio.h>
10	#include <errno.h>	13	#include <errno.h>
11	#include <assert.h>	14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
12		16
13	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
14	# include <unistd.h>	18	# include <unistd.h>
15	# include <sys/mman.h>	19	# include <sys/mman.h>
16	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
…		…
73	/* 5.8.7 */	77	/* 5.8.7 */
74	#ifndef SvRV_set	78	#ifndef SvRV_set
75	# define SvRV_set(s,v) SvRV(s) = (v)	79	# define SvRV_set(s,v) SvRV(s) = (v)
76	#endif	80	#endif
77		81
		82	/* 5.8.8 */
		83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
		89
78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
79	# undef CORO_STACKGUARD	91	# undef CORO_STACKGUARD
80	#endif	92	#endif
81		93
82	#ifndef CORO_STACKGUARD	94	#ifndef CORO_STACKGUARD
…		…
86	/* prefer perl internal functions over our own? */	98	/* prefer perl internal functions over our own? */
87	#ifndef CORO_PREFER_PERL_FUNCTIONS	99	#ifndef CORO_PREFER_PERL_FUNCTIONS
88	# define CORO_PREFER_PERL_FUNCTIONS 0	100	# define CORO_PREFER_PERL_FUNCTIONS 0
89	#endif	101	#endif
90		102
91	/* The next macro should declare a variable stacklevel that contains and approximation	103	/* The next macros try to return the current stack pointer, in an as
92	* to the current C stack pointer. Its property is that it changes with each call	104	* portable way as possible. */
93	* and should be unique. */
94	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
95	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
96		107
97	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
98		109
99	#if __GNUC__ >= 3	110	#if __GNUC__ >= 3
100	# define attribute(x) __attribute__(x)	111	# define attribute(x) __attribute__(x)
101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
102	#else	114	#else
103	# define attribute(x)	115	# define attribute(x)
104	# define BARRIER	116	# define BARRIER
		117	# define expect(expr,value) (expr)
105	#endif	118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
106		122
107	#define NOINLINE attribute ((noinline))	123	#define NOINLINE attribute ((noinline))
108		124
109	#include "CoroAPI.h"	125	#include "CoroAPI.h"
110		126
…		…
127	};	143	};
128		144
129	static size_t coro_stacksize = CORO_STACKSIZE;	145	static size_t coro_stacksize = CORO_STACKSIZE;
130	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
131	static AV *main_mainstack; /* used to differentiate between $main and others */	147	static AV *main_mainstack; /* used to differentiate between $main and others */
		148	static JMPENV *main_top_env;
132	static HV *coro_state_stash, *coro_stash;	149	static HV *coro_state_stash, *coro_stash;
133	static SV *coro_mortal; /* will be freed after next transfer */	150	static volatile SV *coro_mortal; /* will be freed after next transfer */
		151
		152	static GV *irsgv; /* $/ */
		153	static GV *stdoutgv; /* *STDOUT */
		154	static SV *rv_diehook;
		155	static SV *rv_warnhook;
		156	static HV *hv_sig; /* %SIG */
		157
		158	/* async_pool helper stuff */
		159	static SV *sv_pool_rss;
		160	static SV *sv_pool_size;
		161	static AV *av_async_pool;
134		162
135	static struct coro_cctx *cctx_first;	163	static struct coro_cctx *cctx_first;
136	static int cctx_count, cctx_idle;	164	static int cctx_count, cctx_idle;
		165
		166	enum {
		167	CC_MAPPED = 0x01,
		168	CC_NOREUSE = 0x02, /* throw this away after tracing */
		169	CC_TRACE = 0x04,
		170	CC_TRACE_SUB = 0x08, /* trace sub calls */
		171	CC_TRACE_LINE = 0x10, /* trace each statement */
		172	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		173	};
137		174
138	/* this is a structure representing a c-level coroutine */	175	/* this is a structure representing a c-level coroutine */
139	typedef struct coro_cctx {	176	typedef struct coro_cctx {
140	struct coro_cctx *next;	177	struct coro_cctx *next;
141		178
…		…
150	coro_context cctx;	187	coro_context cctx;
151		188
152	#if CORO_USE_VALGRIND	189	#if CORO_USE_VALGRIND
153	int valgrind_id;	190	int valgrind_id;
154	#endif	191	#endif
155	char inuse, mapped;	192	unsigned char flags;
156	} coro_cctx;	193	} coro_cctx;
157		194
158	enum {	195	enum {
159	CF_RUNNING = 0x0001, /* coroutine is running */	196	CF_RUNNING = 0x0001, /* coroutine is running */
160	CF_READY = 0x0002, /* coroutine is ready */	197	CF_READY = 0x0002, /* coroutine is ready */
161	CF_NEW = 0x0004, /* has never been switched to */	198	CF_NEW = 0x0004, /* has never been switched to */
162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	199	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
163	};	200	};
164		201
		202	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		203	typedef struct {
		204	SV *defsv;
		205	AV *defav;
		206	SV *errsv;
		207	SV *irsgv;
		208	#define VAR(name,type) type name;
		209	# include "state.h"
		210	#undef VAR
		211	} perl_slots;
		212
		213	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		214
165	/* this is a structure representing a perl-level coroutine */	215	/* this is a structure representing a perl-level coroutine */
166	struct coro {	216	struct coro {
167	/* the c coroutine allocated to this perl coroutine, if any */	217	/* the c coroutine allocated to this perl coroutine, if any */
168	coro_cctx *cctx;	218	coro_cctx *cctx;
169		219
		220	/* process data */
		221	AV *mainstack;
		222	perl_slots *slot; /* basically the saved sp */
		223
170	/* data associated with this coroutine (initial args) */	224	AV *args; /* data associated with this coroutine (initial args) */
171	AV *args;	225	int refcnt; /* coroutines are refcounted, yes */
172	int refcnt;
173	int save; /* CORO_SAVE flags */
174	int flags; /* CF_ flags */	226	int flags; /* CF_ flags */
		227	HV *hv; /* the perl hash associated with this coro, if any */
175		228
176	/* optionally saved, might be zero */	229	/* statistics */
177	AV *defav; /* @_ */	230	int usecount; /* number of transfers to this coro */
178	SV *defsv; /* $_ */
179	SV *errsv; /* $@ */
180	SV *irssv; /* $/ */
181	SV *irssv_sv; /* real $/ cache */
182
183	#define VAR(name,type) type name;
184	# include "state.h"
185	#undef VAR
186		231
187	/* coro process data */	232	/* coro process data */
188	int prio;	233	int prio;
		234	SV *throw; /* exception to be thrown */
		235
		236	/* async_pool */
		237	SV *saved_deffh;
		238
		239	/* linked list */
		240	struct coro *next, *prev;
189	};	241	};
190		242
191	typedef struct coro *Coro__State;	243	typedef struct coro *Coro__State;
192	typedef struct coro *Coro__State_or_hashref;	244	typedef struct coro *Coro__State_or_hashref;
193		245
…		…
202		254
203	/* for Coro.pm */	255	/* for Coro.pm */
204	static SV *coro_current;	256	static SV *coro_current;
205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	257	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
206	static int coro_nready;	258	static int coro_nready;
		259	static struct coro *coro_first;
207		260
208	/** lowlevel stuff **********************************************************/	261	/** lowlevel stuff **********************************************************/
209		262
		263	static SV *
		264	coro_get_sv (pTHX_ const char *name, int create)
		265	{
		266	#if PERL_VERSION_ATLEAST (5,9,0)
		267	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		268	get_sv (name, create);
		269	#endif
		270	return get_sv (name, create);
		271	}
		272
210	static AV *	273	static AV *
		274	coro_get_av (pTHX_ const char *name, int create)
		275	{
		276	#if PERL_VERSION_ATLEAST (5,9,0)
		277	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		278	get_av (name, create);
		279	#endif
		280	return get_av (name, create);
		281	}
		282
		283	static HV *
		284	coro_get_hv (pTHX_ const char *name, int create)
		285	{
		286	#if PERL_VERSION_ATLEAST (5,9,0)
		287	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		288	get_hv (name, create);
		289	#endif
		290	return get_hv (name, create);
		291	}
		292
		293	static AV *
211	coro_clone_padlist (CV *cv)	294	coro_clone_padlist (pTHX_ CV *cv)
212	{	295	{
213	AV *padlist = CvPADLIST (cv);	296	AV *padlist = CvPADLIST (cv);
214	AV *newpadlist, *newpad;	297	AV *newpadlist, *newpad;
215		298
216	newpadlist = newAV ();	299	newpadlist = newAV ();
…		…
228		311
229	return newpadlist;	312	return newpadlist;
230	}	313	}
231		314
232	static void	315	static void
233	free_padlist (AV *padlist)	316	free_padlist (pTHX_ AV *padlist)
234	{	317	{
235	/* may be during global destruction */	318	/* may be during global destruction */
236	if (SvREFCNT (padlist))	319	if (SvREFCNT (padlist))
237	{	320	{
238	I32 i = AvFILLp (padlist);	321	I32 i = AvFILLp (padlist);
…		…
259	AV *padlist;	342	AV *padlist;
260	AV *av = (AV *)mg->mg_obj;	343	AV *av = (AV *)mg->mg_obj;
261		344
262	/* casting is fun. */	345	/* casting is fun. */
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264	free_padlist (padlist);	347	free_padlist (aTHX_ padlist);
265
266	SvREFCNT_dec (av);
267		348
268	return 0;	349	return 0;
269	}	350	}
270		351
271	#define PERL_MAGIC_coro PERL_MAGIC_ext	352	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		353	#define CORO_MAGIC_type_state PERL_MAGIC_ext
272		354
273	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	355	static MGVTBL coro_cv_vtbl = {
		356	0, 0, 0, 0,
		357	coro_cv_free
		358	};
274		359
275	#define CORO_MAGIC(cv) \	360	#define CORO_MAGIC(sv,type) \
276	SvMAGIC (cv) \	361	SvMAGIC (sv) \
277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	362	? SvMAGIC (sv)->mg_type == type \
278	? SvMAGIC (cv) \	363	? SvMAGIC (sv) \
279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	364	: mg_find (sv, type) \
280	: 0	365	: 0
		366
		367	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		368	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		369
		370	static struct coro *
		371	SvSTATE_ (pTHX_ SV *coro)
		372	{
		373	HV *stash;
		374	MAGIC *mg;
		375
		376	if (SvROK (coro))
		377	coro = SvRV (coro);
		378
		379	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		380	croak ("Coro::State object required");
		381
		382	stash = SvSTASH (coro);
		383	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		384	{
		385	/* very slow, but rare, check */
		386	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		387	croak ("Coro::State object required");
		388	}
		389
		390	mg = CORO_MAGIC_state (coro);
		391	return (struct coro *)mg->mg_ptr;
		392	}
		393
		394	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
281		395
282	/* the next two functions merely cache the padlists */	396	/* the next two functions merely cache the padlists */
283	static void	397	static void
284	get_padlist (CV *cv)	398	get_padlist (pTHX_ CV *cv)
285	{	399	{
286	MAGIC *mg = CORO_MAGIC (cv);	400	MAGIC *mg = CORO_MAGIC_cv (cv);
287	AV *av;	401	AV *av;
288		402
289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291	else	405	else
292	{	406	{
293	#if CORO_PREFER_PERL_FUNCTIONS	407	#if CORO_PREFER_PERL_FUNCTIONS
294	/* this is probably cleaner, but also slower? */	408	/* this is probably cleaner, but also slower? */
295	CV *cp = Perl_cv_clone (cv);	409	CV *cp = Perl_cv_clone (cv);
296	CvPADLIST (cv) = CvPADLIST (cp);	410	CvPADLIST (cv) = CvPADLIST (cp);
297	CvPADLIST (cp) = 0;	411	CvPADLIST (cp) = 0;
298	SvREFCNT_dec (cp);	412	SvREFCNT_dec (cp);
299	#else	413	#else
300	CvPADLIST (cv) = coro_clone_padlist (cv);	414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
301	#endif	415	#endif
302	}	416	}
303	}	417	}
304		418
305	static void	419	static void
306	put_padlist (CV *cv)	420	put_padlist (pTHX_ CV *cv)
307	{	421	{
308	MAGIC *mg = CORO_MAGIC (cv);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
309	AV *av;	423	AV *av;
310		424
311	if (!mg)	425	if (expect_false (!mg))
312	{	426	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
315	mg->mg_virtual = &vtbl_coro;
316	mg->mg_obj = (SV *)newAV ();
317	}
318		427
319	av = (AV *)mg->mg_obj;	428	av = (AV *)mg->mg_obj;
320		429
321	if (AvFILLp (av) >= AvMAX (av))	430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
322	av_extend (av, AvMAX (av) + 1);	431	av_extend (av, AvMAX (av) + 1);
323		432
324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
325	}	434	}
326		435
327	/** load & save, init *******************************************************/	436	/** load & save, init *******************************************************/
328		437
329	#define SB do {
330	#define SE } while (0)
331
332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
333
334	static void	438	static void
335	load_perl (Coro__State c)	439	load_perl (pTHX_ Coro__State c)
336	{	440	{
		441	perl_slots *slot = c->slot;
		442	c->slot = 0;
		443
		444	PL_mainstack = c->mainstack;
		445
		446	GvSV (PL_defgv) = slot->defsv;
		447	GvAV (PL_defgv) = slot->defav;
		448	GvSV (PL_errgv) = slot->errsv;
		449	GvSV (irsgv) = slot->irsgv;
		450
337	#define VAR(name,type) PL_ ## name = c->name;	451	#define VAR(name,type) PL_ ## name = slot->name;
338	# include "state.h"	452	# include "state.h"
339	#undef VAR	453	#undef VAR
340
341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
344	if (c->irssv)
345	{
346	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
347	SvREFCNT_dec (c->irssv);
348	else
349	{
350	REPLACE_SV (PL_rs, c->irssv);
351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
352	sv_setsv (c->irssv_sv, PL_rs);
353	}
354	}
355		454
356	{	455	{
357	dSP;	456	dSP;
		457
358	CV *cv;	458	CV *cv;
359		459
360	/* now do the ugly restore mess */	460	/* now do the ugly restore mess */
361	while ((cv = (CV *)POPs))	461	while (expect_true (cv = (CV *)POPs))
362	{	462	{
363	put_padlist (cv); /* mark this padlist as available */	463	put_padlist (aTHX_ cv); /* mark this padlist as available */
364	CvDEPTH (cv) = PTR2IV (POPs);	464	CvDEPTH (cv) = PTR2IV (POPs);
365	CvPADLIST (cv) = (AV *)POPs;	465	CvPADLIST (cv) = (AV *)POPs;
366	}	466	}
367		467
368	PUTBACK;	468	PUTBACK;
369	}	469	}
370	assert (!PL_comppad || AvARRAY (PL_comppad));//D
371	}	470	}
372		471
373	static void	472	static void
374	save_perl (Coro__State c)	473	save_perl (pTHX_ Coro__State c)
375	{	474	{
376	assert (!PL_comppad || AvARRAY (PL_comppad));//D
377	{	475	{
378	dSP;	476	dSP;
379	I32 cxix = cxstack_ix;	477	I32 cxix = cxstack_ix;
380	PERL_CONTEXT *ccstk = cxstack;	478	PERL_CONTEXT *ccstk = cxstack;
381	PERL_SI *top_si = PL_curstackinfo;	479	PERL_SI *top_si = PL_curstackinfo;
…		…
383	/*	481	/*
384	* the worst thing you can imagine happens first - we have to save	482	* the worst thing you can imagine happens first - we have to save
385	* (and reinitialize) all cv's in the whole callchain :(	483	* (and reinitialize) all cv's in the whole callchain :(
386	*/	484	*/
387		485
388	EXTEND (SP, 3 + 1);
389	PUSHs (Nullsv);	486	XPUSHs (Nullsv);
390	/* this loop was inspired by pp_caller */	487	/* this loop was inspired by pp_caller */
391	for (;;)	488	for (;;)
392	{	489	{
393	while (cxix >= 0)	490	while (expect_true (cxix >= 0))
394	{	491	{
395	PERL_CONTEXT *cx = &ccstk[cxix--];	492	PERL_CONTEXT *cx = &ccstk[cxix--];
396		493
397	if (CxTYPE (cx) == CXt_SUB)	494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
398	{	495	{
399	CV *cv = cx->blk_sub.cv;	496	CV *cv = cx->blk_sub.cv;
400		497
401	if (CvDEPTH (cv))	498	if (expect_true (CvDEPTH (cv)))
402	{	499	{
403	EXTEND (SP, 3);	500	EXTEND (SP, 3);
404	PUSHs ((SV *)CvPADLIST (cv));	501	PUSHs ((SV *)CvPADLIST (cv));
405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
406	PUSHs ((SV *)cv);	503	PUSHs ((SV *)cv);
407		504
408	CvDEPTH (cv) = 0;	505	CvDEPTH (cv) = 0;
409	get_padlist (cv);	506	get_padlist (aTHX_ cv);
410	}	507	}
411	}	508	}
412	}	509	}
413		510
414	if (top_si->si_type == PERLSI_MAIN)	511	if (expect_true (top_si->si_type == PERLSI_MAIN))
415	break;	512	break;
416		513
417	top_si = top_si->si_prev;	514	top_si = top_si->si_prev;
418	ccstk = top_si->si_cxstack;	515	ccstk = top_si->si_cxstack;
419	cxix = top_si->si_cxix;	516	cxix = top_si->si_cxix;
420	}	517	}
421		518
422	PUTBACK;	519	PUTBACK;
423	}	520	}
424		521
425	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	522	/* allocate some space on the context stack for our purposes */
426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	523	/* we manually unroll here, as usually 2 slots is enough */
427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	524	if (SLOT_COUNT >= 1) CXINC;
428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	525	if (SLOT_COUNT >= 2) CXINC;
		526	if (SLOT_COUNT >= 3) CXINC;
		527	{
		528	int i;
		529	for (i = 3; i < SLOT_COUNT; ++i)
		530	CXINC;
		531	}
		532	cxstack_ix -= SLOT_COUNT; /* undo allocation */
429		533
		534	c->mainstack = PL_mainstack;
		535
		536	{
		537	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		538
		539	slot->defav = GvAV (PL_defgv);
		540	slot->defsv = DEFSV;
		541	slot->errsv = ERRSV;
		542	slot->irsgv = GvSV (irsgv);
		543
430	#define VAR(name,type)c->name = PL_ ## name;	544	#define VAR(name,type) slot->name = PL_ ## name;
431	# include "state.h"	545	# include "state.h"
432	#undef VAR	546	#undef VAR
		547	}
433	}	548	}
434		549
435	/*	550	/*
436	* allocate various perl stacks. This is an exact copy	551	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	552	* of perl.c:init_stacks, except that it uses less memory
…		…
440	*/	555	*/
441	#if CORO_PREFER_PERL_FUNCTIONS	556	#if CORO_PREFER_PERL_FUNCTIONS
442	# define coro_init_stacks init_stacks	557	# define coro_init_stacks init_stacks
443	#else	558	#else
444	static void	559	static void
445	coro_init_stacks ()	560	coro_init_stacks (pTHX)
446	{	561	{
447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	562	PL_curstackinfo = new_stackinfo(32, 8);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	563	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	564	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		566
452	PL_stack_base = AvARRAY(PL_curstack);	567	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	568	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	569	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		570
456	New(50,PL_tmps_stack,128,SV*);	571	New(50,PL_tmps_stack,32,SV*);
457	PL_tmps_floor = -1;	572	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	573	PL_tmps_ix = -1;
459	PL_tmps_max = 128;	574	PL_tmps_max = 32;
460		575
461	New(54,PL_markstack,32,I32);	576	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	577	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 32;	578	PL_markstack_max = PL_markstack + 16;
464		579
465	#ifdef SET_MARK_OFFSET	580	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	581	SET_MARK_OFFSET;
467	#endif	582	#endif
468		583
469	New(54,PL_scopestack,32,I32);	584	New(54,PL_scopestack,8,I32);
470	PL_scopestack_ix = 0;	585	PL_scopestack_ix = 0;
471	PL_scopestack_max = 32;	586	PL_scopestack_max = 8;
472		587
473	New(54,PL_savestack,64,ANY);	588	New(54,PL_savestack,24,ANY);
474	PL_savestack_ix = 0;	589	PL_savestack_ix = 0;
475	PL_savestack_max = 64;	590	PL_savestack_max = 24;
476		591
477	#if !PERL_VERSION_ATLEAST (5,9,0)	592	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,16,OP*);	593	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	594	PL_retstack_ix = 0;
480	PL_retstack_max = 16;	595	PL_retstack_max = 4;
481	#endif	596	#endif
482	}	597	}
483	#endif	598	#endif
484		599
485	/*	600	/*
486	* destroy the stacks, the callchain etc...	601	* destroy the stacks, the callchain etc...
487	*/	602	*/
488	static void	603	static void
489	coro_destroy_stacks ()	604	coro_destroy_stacks (pTHX)
490	{	605	{
491	if (!IN_DESTRUCT)
492	{
493	/* restore all saved variables and stuff */
494	LEAVE_SCOPE (0);
495	assert (PL_tmps_floor == -1);
496
497	/* free all temporaries */
498	FREETMPS;
499	assert (PL_tmps_ix == -1);
500
501	/* unwind all extra stacks */
502	POPSTACK_TO (PL_mainstack);
503
504	/* unwind main stack */
505	dounwind (-1);
506	}
507
508	while (PL_curstackinfo->si_next)	606	while (PL_curstackinfo->si_next)
509	PL_curstackinfo = PL_curstackinfo->si_next;	607	PL_curstackinfo = PL_curstackinfo->si_next;
510		608
511	while (PL_curstackinfo)	609	while (PL_curstackinfo)
512	{	610	{
…		…
527	#if !PERL_VERSION_ATLEAST (5,9,0)	625	#if !PERL_VERSION_ATLEAST (5,9,0)
528	Safefree (PL_retstack);	626	Safefree (PL_retstack);
529	#endif	627	#endif
530	}	628	}
531		629
		630	static size_t
		631	coro_rss (pTHX_ struct coro *coro)
		632	{
		633	size_t rss = sizeof (*coro);
		634
		635	if (coro->mainstack)
		636	{
		637	perl_slots tmp_slot;
		638	perl_slots *slot;
		639
		640	if (coro->flags & CF_RUNNING)
		641	{
		642	slot = &tmp_slot;
		643
		644	#define VAR(name,type) slot->name = PL_ ## name;
		645	# include "state.h"
		646	#undef VAR
		647	}
		648	else
		649	slot = coro->slot;
		650
		651	rss += sizeof (slot->curstackinfo);
		652	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		653	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		654	rss += slot->tmps_max * sizeof (SV *);
		655	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		656	rss += slot->scopestack_max * sizeof (I32);
		657	rss += slot->savestack_max * sizeof (ANY);
		658
		659	#if !PERL_VERSION_ATLEAST (5,9,0)
		660	rss += slot->retstack_max * sizeof (OP *);
		661	#endif
		662	}
		663
		664	return rss;
		665	}
		666
532	/** coroutine stack handling ************************************************/	667	/** coroutine stack handling ************************************************/
533		668
		669	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		670	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		671
		672	/*
		673	* This overrides the default magic get method of %SIG elements.
		674	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		675	* and instead of tryign to save and restore the hash elements, we just provide
		676	* readback here.
		677	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		678	* not expecting this to actually change the hook. This is a potential problem
		679	* when a schedule happens then, but we ignore this.
		680	*/
		681	static int
		682	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		683	{
		684	const char *s = MgPV_nolen_const (mg);
		685
		686	if (*s == '_')
		687	{
		688	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		689	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		690	}
		691
		692	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		693	}
		694
		695	static int
		696	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		697	{
		698	const char *s = MgPV_nolen_const (mg);
		699
		700	if (*s == '_')
		701	{
		702	SV **svp = 0;
		703
		704	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		705	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		706
		707	if (svp)
		708	{
		709	SV *old = *svp;
		710	*svp = newSVsv (sv);
		711	SvREFCNT_dec (old);
		712	return;
		713	}
		714	}
		715
		716	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		717	}
		718
534	static void	719	static void
535	setup_coro (struct coro *coro)	720	coro_setup (pTHX_ struct coro *coro)
536	{	721	{
537	/*	722	/*
538	* emulate part of the perl startup here.	723	* emulate part of the perl startup here.
539	*/	724	*/
540
541	coro_init_stacks ();	725	coro_init_stacks (aTHX);
542		726
		727	PL_runops = RUNOPS_DEFAULT;
543	PL_curcop = &PL_compiling;	728	PL_curcop = &PL_compiling;
544	PL_in_eval = EVAL_NULL;	729	PL_in_eval = EVAL_NULL;
545	PL_comppad = 0;	730	PL_comppad = 0;
546	PL_curpm = 0;	731	PL_curpm = 0;
		732	PL_curpad = 0;
547	PL_localizing = 0;	733	PL_localizing = 0;
548	PL_dirty = 0;	734	PL_dirty = 0;
549	PL_restartop = 0;	735	PL_restartop = 0;
550		736
		737	/* recreate the die/warn hooks */
		738	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		739	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		740
		741	GvSV (PL_defgv) = newSV (0);
		742	GvAV (PL_defgv) = coro->args; coro->args = 0;
		743	GvSV (PL_errgv) = newSV (0);
		744	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		745	PL_rs = newSVsv (GvSV (irsgv));
		746	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		747
551	{	748	{
552	dSP;	749	dSP;
553	LOGOP myop;	750	LOGOP myop;
554		751
555	SvREFCNT_dec (GvAV (PL_defgv));
556	GvAV (PL_defgv) = coro->args; coro->args = 0;
557
558	Zero (&myop, 1, LOGOP);	752	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	753	myop.op_next = Nullop;
560	myop.op_flags = OPf_WANT_VOID;	754	myop.op_flags = OPf_WANT_VOID;
561		755
562	PUSHMARK (SP);	756	PUSHMARK (SP);
563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	757	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
564	PUTBACK;	758	PUTBACK;
565	PL_op = (OP *)&myop;	759	PL_op = (OP *)&myop;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	760	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	761	SPAGAIN;
568	}	762	}
569		763
570	ENTER; /* necessary e.g. for dounwind */	764	/* this newly created coroutine might be run on an existing cctx which most
		765	* likely was suspended in set_stacklevel, called from entersub.
		766	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		767	* so we ENTER here for symmetry
		768	*/
		769	ENTER;
571	}	770	}
572		771
573	static void	772	static void
		773	coro_destroy (pTHX_ struct coro *coro)
		774	{
		775	if (!IN_DESTRUCT)
		776	{
		777	/* restore all saved variables and stuff */
		778	LEAVE_SCOPE (0);
		779	assert (PL_tmps_floor == -1);
		780
		781	/* free all temporaries */
		782	FREETMPS;
		783	assert (PL_tmps_ix == -1);
		784
		785	/* unwind all extra stacks */
		786	POPSTACK_TO (PL_mainstack);
		787
		788	/* unwind main stack */
		789	dounwind (-1);
		790	}
		791
		792	SvREFCNT_dec (GvSV (PL_defgv));
		793	SvREFCNT_dec (GvAV (PL_defgv));
		794	SvREFCNT_dec (GvSV (PL_errgv));
		795	SvREFCNT_dec (PL_defoutgv);
		796	SvREFCNT_dec (PL_rs);
		797	SvREFCNT_dec (GvSV (irsgv));
		798
		799	SvREFCNT_dec (PL_diehook);
		800	SvREFCNT_dec (PL_warnhook);
		801
		802	SvREFCNT_dec (coro->saved_deffh);
		803	SvREFCNT_dec (coro->throw);
		804
		805	coro_destroy_stacks (aTHX);
		806	}
		807
		808	static void
574	free_coro_mortal ()	809	free_coro_mortal (pTHX)
575	{	810	{
576	if (coro_mortal)	811	if (expect_true (coro_mortal))
577	{	812	{
578	SvREFCNT_dec (coro_mortal);	813	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;	814	coro_mortal = 0;
580	}	815	}
581	}	816	}
582		817
		818	static int
		819	runops_trace (pTHX)
		820	{
		821	COP *oldcop = 0;
		822	int oldcxix = -2;
		823	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		824	coro_cctx *cctx = coro->cctx;
		825
		826	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		827	{
		828	PERL_ASYNC_CHECK ();
		829
		830	if (cctx->flags & CC_TRACE_ALL)
		831	{
		832	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		833	{
		834	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		835	SV **bot, **top;
		836	AV *av = newAV (); /* return values */
		837	SV **cb;
		838	dSP;
		839
		840	GV *gv = CvGV (cx->blk_sub.cv);
		841	SV *fullname = sv_2mortal (newSV (0));
		842	if (isGV (gv))
		843	gv_efullname3 (fullname, gv, 0);
		844
		845	bot = PL_stack_base + cx->blk_oldsp + 1;
		846	top = cx->blk_gimme == G_ARRAY ? SP + 1
		847	: cx->blk_gimme == G_SCALAR ? bot + 1
		848	: bot;
		849
		850	av_extend (av, top - bot);
		851	while (bot < top)
		852	av_push (av, SvREFCNT_inc (*bot++));
		853
		854	PL_runops = RUNOPS_DEFAULT;
		855	ENTER;
		856	SAVETMPS;
		857	EXTEND (SP, 3);
		858	PUSHMARK (SP);
		859	PUSHs (&PL_sv_no);
		860	PUSHs (fullname);
		861	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		862	PUTBACK;
		863	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		864	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		865	SPAGAIN;
		866	FREETMPS;
		867	LEAVE;
		868	PL_runops = runops_trace;
		869	}
		870
		871	if (oldcop != PL_curcop)
		872	{
		873	oldcop = PL_curcop;
		874
		875	if (PL_curcop != &PL_compiling)
		876	{
		877	SV **cb;
		878
		879	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		880	{
		881	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		882
		883	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		884	{
		885	runops_proc_t old_runops = PL_runops;
		886	dSP;
		887	GV *gv = CvGV (cx->blk_sub.cv);
		888	SV *fullname = sv_2mortal (newSV (0));
		889
		890	if (isGV (gv))
		891	gv_efullname3 (fullname, gv, 0);
		892
		893	PL_runops = RUNOPS_DEFAULT;
		894	ENTER;
		895	SAVETMPS;
		896	EXTEND (SP, 3);
		897	PUSHMARK (SP);
		898	PUSHs (&PL_sv_yes);
		899	PUSHs (fullname);
		900	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		901	PUTBACK;
		902	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		903	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		904	SPAGAIN;
		905	FREETMPS;
		906	LEAVE;
		907	PL_runops = runops_trace;
		908	}
		909
		910	oldcxix = cxstack_ix;
		911	}
		912
		913	if (cctx->flags & CC_TRACE_LINE)
		914	{
		915	dSP;
		916
		917	PL_runops = RUNOPS_DEFAULT;
		918	ENTER;
		919	SAVETMPS;
		920	EXTEND (SP, 3);
		921	PL_runops = RUNOPS_DEFAULT;
		922	PUSHMARK (SP);
		923	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		924	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		925	PUTBACK;
		926	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		927	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		928	SPAGAIN;
		929	FREETMPS;
		930	LEAVE;
		931	PL_runops = runops_trace;
		932	}
		933	}
		934	}
		935	}
		936	}
		937
		938	TAINT_NOT;
		939	return 0;
		940	}
		941
583	/* inject a fake call to Coro::State::_cctx_init into the execution */	942	/* inject a fake call to Coro::State::_cctx_init into the execution */
		943	/* _cctx_init should be careful, as it could be called at almost any time */
		944	/* during execution of a perl program */
584	static void NOINLINE	945	static void NOINLINE
585	prepare_cctx (coro_cctx *cctx)	946	cctx_prepare (pTHX_ coro_cctx *cctx)
586	{	947	{
587	dSP;	948	dSP;
588	LOGOP myop;	949	LOGOP myop;
		950
		951	PL_top_env = &PL_start_env;
		952
		953	if (cctx->flags & CC_TRACE)
		954	PL_runops = runops_trace;
589		955
590	Zero (&myop, 1, LOGOP);	956	Zero (&myop, 1, LOGOP);
591	myop.op_next = PL_op;	957	myop.op_next = PL_op;
592	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	958	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
593		959
…		…
599	PL_op = (OP *)&myop;	965	PL_op = (OP *)&myop;
600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	966	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
601	SPAGAIN;	967	SPAGAIN;
602	}	968	}
603		969
		970	/*
		971	* this is a _very_ stripped down perl interpreter ;)
		972	*/
604	static void	973	static void
605	coro_run (void *arg)	974	cctx_run (void *arg)
606	{	975	{
		976	dTHX;
		977
607	/* coro_run is the alternative tail of transfer(), so unlock here. */	978	/* cctx_run is the alternative tail of transfer(), so unlock here. */
608	UNLOCK;	979	UNLOCK;
609		980
610	/*	981	/* we now skip the entersub that lead to transfer() */
611	* this is a _very_ stripped down perl interpreter ;)	982	PL_op = PL_op->op_next;
612	*/
613	PL_top_env = &PL_start_env;
614		983
615	/* inject call to cctx_init */	984	/* inject a fake subroutine call to cctx_init */
616	prepare_cctx ((coro_cctx *)arg);	985	cctx_prepare (aTHX_ (coro_cctx *)arg);
617		986
618	/* somebody will hit me for both perl_run and PL_restartop */	987	/* somebody or something will hit me for both perl_run and PL_restartop */
619	PL_restartop = PL_op;	988	PL_restartop = PL_op;
620	perl_run (PL_curinterp);	989	perl_run (PL_curinterp);
621		990
622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	991	/*
623	abort ();	992	* If perl-run returns we assume exit() was being called or the coro
		993	* fell off the end, which seems to be the only valid (non-bug)
		994	* reason for perl_run to return. We try to exit by jumping to the
		995	* bootstrap-time "top" top_env, as we cannot restore the "main"
		996	* coroutine as Coro has no such concept
		997	*/
		998	PL_top_env = main_top_env;
		999	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
624	}	1000	}
625		1001
626	static coro_cctx *	1002	static coro_cctx *
627	cctx_new ()	1003	cctx_new ()
628	{	1004	{
…		…
633	++cctx_count;	1009	++cctx_count;
634		1010
635	Newz (0, cctx, 1, coro_cctx);	1011	Newz (0, cctx, 1, coro_cctx);
636		1012
637	#if HAVE_MMAP	1013	#if HAVE_MMAP
638
639	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1014	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640	/* mmap supposedly does allocate-on-write for us */	1015	/* mmap supposedly does allocate-on-write for us */
641	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1016	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
642		1017
643	if (cctx->sptr != (void *)-1)	1018	if (cctx->sptr != (void *)-1)
…		…
645	# if CORO_STACKGUARD	1020	# if CORO_STACKGUARD
646	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1021	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
647	# endif	1022	# endif
648	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1023	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
649	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1024	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
650	cctx->mapped = 1;	1025	cctx->flags |= CC_MAPPED;
651	}	1026	}
652	else	1027	else
653	#endif	1028	#endif
654	{	1029	{
655	cctx->ssize = coro_stacksize * (long)sizeof (long);	1030	cctx->ssize = coro_stacksize * (long)sizeof (long);
…		…
664	stack_start = cctx->sptr;	1039	stack_start = cctx->sptr;
665	stack_size = cctx->ssize;	1040	stack_size = cctx->ssize;
666	}	1041	}
667		1042
668	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1043	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
669	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);	1044	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
670		1045
671	return cctx;	1046	return cctx;
672	}	1047	}
673		1048
674	static void	1049	static void
…		…
682	#if CORO_USE_VALGRIND	1057	#if CORO_USE_VALGRIND
683	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1058	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
684	#endif	1059	#endif
685		1060
686	#if HAVE_MMAP	1061	#if HAVE_MMAP
687	if (cctx->mapped)	1062	if (cctx->flags & CC_MAPPED)
688	munmap (cctx->sptr, cctx->ssize);	1063	munmap (cctx->sptr, cctx->ssize);
689	else	1064	else
690	#endif	1065	#endif
691	Safefree (cctx->sptr);	1066	Safefree (cctx->sptr);
692		1067
693	Safefree (cctx);	1068	Safefree (cctx);
694	}	1069	}
695		1070
		1071	/* wether this cctx should be destructed */
		1072	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1073
696	static coro_cctx *	1074	static coro_cctx *
697	cctx_get ()	1075	cctx_get (pTHX)
698	{	1076	{
699	while (cctx_first)	1077	while (expect_true (cctx_first))
700	{	1078	{
701	coro_cctx *cctx = cctx_first;	1079	coro_cctx *cctx = cctx_first;
702	cctx_first = cctx->next;	1080	cctx_first = cctx->next;
703	--cctx_idle;	1081	--cctx_idle;
704		1082
705	if (cctx->ssize >= coro_stacksize)	1083	if (expect_true (!CCTX_EXPIRED (cctx)))
706	return cctx;	1084	return cctx;
707		1085
708	cctx_destroy (cctx);	1086	cctx_destroy (cctx);
709	}	1087	}
710		1088
711	PL_op = PL_op->op_next;
712	return cctx_new ();	1089	return cctx_new ();
713	}	1090	}
714		1091
715	static void	1092	static void
716	cctx_put (coro_cctx *cctx)	1093	cctx_put (coro_cctx *cctx)
717	{	1094	{
718	/* free another cctx if overlimit */	1095	/* free another cctx if overlimit */
719	if (cctx_idle >= MAX_IDLE_CCTX)	1096	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
720	{	1097	{
721	coro_cctx *first = cctx_first;	1098	coro_cctx *first = cctx_first;
722	cctx_first = first->next;	1099	cctx_first = first->next;
723	--cctx_idle;	1100	--cctx_idle;
724		1101
725	assert (!first->inuse);
726	cctx_destroy (first);	1102	cctx_destroy (first);
727	}	1103	}
728		1104
729	++cctx_idle;	1105	++cctx_idle;
730	cctx->next = cctx_first;	1106	cctx->next = cctx_first;
731	cctx_first = cctx;	1107	cctx_first = cctx;
732	}	1108	}
733		1109
734	/** coroutine switching *****************************************************/	1110	/** coroutine switching *****************************************************/
735		1111
736	/* never call directly, always through the coro_state_transfer global variable */	1112	static void
		1113	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1114	{
		1115	if (expect_true (prev != next))
		1116	{
		1117	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1118	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1119
		1120	if (expect_false (next->flags & CF_RUNNING))
		1121	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1122
		1123	if (expect_false (next->flags & CF_DESTROYED))
		1124	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1125
		1126	if (
		1127	#if PERL_VERSION_ATLEAST (5,9,0)
		1128	expect_false (PL_parser)
		1129	#else
		1130	expect_false (PL_lex_state != LEX_NOTPARSING)
		1131	#endif
		1132	)
		1133	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1134	}
		1135	}
		1136
		1137	/* always use the TRANSFER macro */
737	static void NOINLINE	1138	static void NOINLINE
738	transfer (struct coro *prev, struct coro *next)	1139	transfer (pTHX_ struct coro *prev, struct coro *next)
739	{	1140	{
740	dSTACKLEVEL;	1141	dSTACKLEVEL;
		1142	static volatile int has_throw;
741		1143
742	/* sometimes transfer is only called to set idle_sp */	1144	/* sometimes transfer is only called to set idle_sp */
743	if (!next)	1145	if (expect_false (!next))
744	{	1146	{
745	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1147	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
746	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1148	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747	}	1149	}
748	else if (prev != next)	1150	else if (expect_true (prev != next))
749	{	1151	{
750	coro_cctx *prev__cctx;	1152	coro_cctx *prev__cctx;
751		1153
752	if (prev->flags & CF_NEW)	1154	if (expect_false (prev->flags & CF_NEW))
753	{	1155	{
754	/* create a new empty context */	1156	/* create a new empty context */
755	Newz (0, prev->cctx, 1, coro_cctx);	1157	Newz (0, prev->cctx, 1, coro_cctx);
756	prev->cctx->inuse = 1;
757	prev->flags &= ~CF_NEW;	1158	prev->flags &= ~CF_NEW;
758	prev->flags |= CF_RUNNING;	1159	prev->flags |= CF_RUNNING;
759	}	1160	}
760		1161
761	/*TODO: must not croak here */
762	if (!prev->flags & CF_RUNNING)
763	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
764
765	if (next->flags & CF_RUNNING)
766	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
767
768	if (next->flags & CF_DESTROYED)
769	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
770
771	prev->flags &= ~CF_RUNNING;	1162	prev->flags &= ~CF_RUNNING;
772	next->flags |= CF_RUNNING;	1163	next->flags |= CF_RUNNING;
773		1164
774	LOCK;	1165	LOCK;
775		1166
		1167	/* first get rid of the old state */
		1168	save_perl (aTHX_ prev);
		1169
776	if (next->flags & CF_NEW)	1170	if (expect_false (next->flags & CF_NEW))
777	{	1171	{
778	/* need to start coroutine */	1172	/* need to start coroutine */
779	next->flags &= ~CF_NEW;	1173	next->flags &= ~CF_NEW;
780	/* first get rid of the old state */
781	save_perl (prev);
782	/* setup coroutine call */	1174	/* setup coroutine call */
783	setup_coro (next);	1175	coro_setup (aTHX_ next);
784	/* need a new stack */
785	assert (!next->cctx);
786	}	1176	}
787	else	1177	else
788	{
789	/* coroutine already started */
790	save_perl (prev);
791	load_perl (next);	1178	load_perl (aTHX_ next);
792	}
793		1179
794	prev__cctx = prev->cctx;	1180	prev__cctx = prev->cctx;
795		1181
796	/* possibly "free" the cctx */	1182	/* possibly "free" the cctx */
797	if (prev__cctx->idle_sp == STACKLEVEL)	1183	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
798	{	1184	{
799	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1185	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
800	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1186	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
801		1187
802	prev->cctx = 0;	1188	prev->cctx = 0;
803		1189
		1190	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1191	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1192	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1193	if (!next->cctx)
		1194	next->cctx = cctx_get (aTHX);
		1195
804	cctx_put (prev__cctx);	1196	cctx_put (prev__cctx);
805	prev__cctx->inuse = 0;
806	}	1197	}
807		1198
		1199	++next->usecount;
		1200
808	if (!next->cctx)	1201	if (expect_true (!next->cctx))
809	{
810	next->cctx = cctx_get ();	1202	next->cctx = cctx_get (aTHX);
811	assert (!next->cctx->inuse);
812	next->cctx->inuse = 1;
813	}
814		1203
		1204	has_throw = !!next->throw;
		1205
815	if (prev__cctx != next->cctx)	1206	if (expect_false (prev__cctx != next->cctx))
816	{	1207	{
817	prev__cctx->top_env = PL_top_env;	1208	prev__cctx->top_env = PL_top_env;
818	PL_top_env = next->cctx->top_env;	1209	PL_top_env = next->cctx->top_env;
819	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1210	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
820	}	1211	}
821		1212
822	free_coro_mortal ();	1213	free_coro_mortal (aTHX);
823	UNLOCK;	1214	UNLOCK;
		1215
		1216	if (expect_false (has_throw))
		1217	{
		1218	struct coro *coro = SvSTATE (coro_current);
		1219
		1220	if (coro->throw)
		1221	{
		1222	SV *exception = coro->throw;
		1223	coro->throw = 0;
		1224	sv_setsv (ERRSV, exception);
		1225	croak (0);
		1226	}
		1227	}
824	}	1228	}
825	}	1229	}
826		1230
827	struct transfer_args	1231	struct transfer_args
828	{	1232	{
829	struct coro *prev, *next;	1233	struct coro *prev, *next;
830	};	1234	};
831		1235
832	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1236	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1237	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
833		1238
834	/** high level stuff ********************************************************/	1239	/** high level stuff ********************************************************/
835		1240
836	static int	1241	static int
837	coro_state_destroy (struct coro *coro)	1242	coro_state_destroy (pTHX_ struct coro *coro)
838	{	1243	{
839	if (coro->flags & CF_DESTROYED)	1244	if (coro->flags & CF_DESTROYED)
840	return 0;	1245	return 0;
841		1246
842	coro->flags |= CF_DESTROYED;	1247	coro->flags |= CF_DESTROYED;
…		…
854		1259
855	if (coro->mainstack && coro->mainstack != main_mainstack)	1260	if (coro->mainstack && coro->mainstack != main_mainstack)
856	{	1261	{
857	struct coro temp;	1262	struct coro temp;
858		1263
859	assert (!(coro->flags & CF_RUNNING));
860
861	Zero (&temp, 1, struct coro);
862	temp.save = CORO_SAVE_ALL;
863
864	if (coro->flags & CF_RUNNING)	1264	if (coro->flags & CF_RUNNING)
865	croak ("FATAL: tried to destroy currently running coroutine");	1265	croak ("FATAL: tried to destroy currently running coroutine");
866		1266
867	save_perl (&temp);	1267	save_perl (aTHX_ &temp);
868	load_perl (coro);	1268	load_perl (aTHX_ coro);
869		1269
870	coro_destroy_stacks ();	1270	coro_destroy (aTHX_ coro);
871		1271
872	load_perl (&temp); /* this will get rid of defsv etc.. */	1272	load_perl (aTHX_ &temp);
873		1273
874	coro->mainstack = 0;	1274	coro->slot = 0;
875	}	1275	}
876		1276
877	cctx_destroy (coro->cctx);	1277	cctx_destroy (coro->cctx);
878	SvREFCNT_dec (coro->args);	1278	SvREFCNT_dec (coro->args);
879		1279
		1280	if (coro->next) coro->next->prev = coro->prev;
		1281	if (coro->prev) coro->prev->next = coro->next;
		1282	if (coro == coro_first) coro_first = coro->next;
		1283
880	return 1;	1284	return 1;
881	}	1285	}
882		1286
883	static int	1287	static int
884	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1288	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
885	{	1289	{
886	struct coro *coro = (struct coro *)mg->mg_ptr;	1290	struct coro *coro = (struct coro *)mg->mg_ptr;
887	mg->mg_ptr = 0;	1291	mg->mg_ptr = 0;
888		1292
		1293	coro->hv = 0;
		1294
889	if (--coro->refcnt < 0)	1295	if (--coro->refcnt < 0)
890	{	1296	{
891	coro_state_destroy (coro);	1297	coro_state_destroy (aTHX_ coro);
892	Safefree (coro);	1298	Safefree (coro);
893	}	1299	}
894		1300
895	return 0;	1301	return 0;
896	}	1302	}
…		…
914	#else	1320	#else
915	# define MGf_DUP 0	1321	# define MGf_DUP 0
916	#endif	1322	#endif
917	};	1323	};
918		1324
919	static struct coro *
920	SvSTATE (SV *coro)
921	{
922	HV *stash;
923	MAGIC *mg;
924
925	if (SvROK (coro))
926	coro = SvRV (coro);
927
928	stash = SvSTASH (coro);
929	if (stash != coro_stash && stash != coro_state_stash)
930	{
931	/* very slow, but rare, check */
932	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
933	croak ("Coro::State object required");
934	}
935
936	mg = CORO_MAGIC (coro);
937	return (struct coro *)mg->mg_ptr;
938	}
939
940	static void	1325	static void
941	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1326	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
942	{	1327	{
943	ta->prev = SvSTATE (prev_sv);	1328	ta->prev = SvSTATE (prev_sv);
944	ta->next = SvSTATE (next_sv);	1329	ta->next = SvSTATE (next_sv);
		1330	TRANSFER_CHECK (*ta);
945	}	1331	}
946		1332
947	static void	1333	static void
948	api_transfer (SV *prev_sv, SV *next_sv)	1334	api_transfer (SV *prev_sv, SV *next_sv)
949	{	1335	{
		1336	dTHX;
950	struct transfer_args ta;	1337	struct transfer_args ta;
951		1338
952	prepare_transfer (&ta, prev_sv, next_sv);	1339	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
953	TRANSFER (ta);	1340	TRANSFER (ta);
954	}	1341	}
955		1342
956	static int
957	api_save (SV *coro_sv, int new_save)
958	{
959	struct coro *coro = SvSTATE (coro_sv);
960	int old_save = coro->save;
961
962	if (new_save >= 0)
963	coro->save = new_save;
964
965	return old_save;
966	}
967
968	/** Coro ********************************************************************/	1343	/** Coro ********************************************************************/
969		1344
970	static void	1345	static void
971	coro_enq (SV *coro_sv)	1346	coro_enq (pTHX_ SV *coro_sv)
972	{	1347	{
973	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1348	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
974	}	1349	}
975		1350
976	static SV *	1351	static SV *
977	coro_deq (int min_prio)	1352	coro_deq (pTHX)
978	{	1353	{
979	int prio = PRIO_MAX - PRIO_MIN;	1354	int prio;
980		1355
981	min_prio -= PRIO_MIN;
982	if (min_prio < 0)
983	min_prio = 0;
984
985	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1356	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
986	if (AvFILLp (coro_ready [prio]) >= 0)	1357	if (AvFILLp (coro_ready [prio]) >= 0)
987	return av_shift (coro_ready [prio]);	1358	return av_shift (coro_ready [prio]);
988		1359
989	return 0;	1360	return 0;
990	}	1361	}
991		1362
992	static int	1363	static int
993	api_ready (SV *coro_sv)	1364	api_ready (SV *coro_sv)
994	{	1365	{
		1366	dTHX;
995	struct coro *coro;	1367	struct coro *coro;
996		1368
997	if (SvROK (coro_sv))	1369	if (SvROK (coro_sv))
998	coro_sv = SvRV (coro_sv);	1370	coro_sv = SvRV (coro_sv);
999		1371
…		…
1003	return 0;	1375	return 0;
1004		1376
1005	coro->flags |= CF_READY;	1377	coro->flags |= CF_READY;
1006		1378
1007	LOCK;	1379	LOCK;
1008	coro_enq (SvREFCNT_inc (coro_sv));	1380	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1009	++coro_nready;	1381	++coro_nready;
1010	UNLOCK;	1382	UNLOCK;
1011		1383
1012	return 1;	1384	return 1;
1013	}	1385	}
1014		1386
1015	static int	1387	static int
1016	api_is_ready (SV *coro_sv)	1388	api_is_ready (SV *coro_sv)
1017	{	1389	{
		1390	dTHX;
1018	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1391	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1019	}	1392	}
1020		1393
1021	static void	1394	static void
1022	prepare_schedule (struct transfer_args *ta)	1395	prepare_schedule (pTHX_ struct transfer_args *ta)
1023	{	1396	{
1024	SV *prev_sv, *next_sv;	1397	SV *prev_sv, *next_sv;
1025		1398
1026	for (;;)	1399	for (;;)
1027	{	1400	{
1028	LOCK;	1401	LOCK;
1029	next_sv = coro_deq (PRIO_MIN);	1402	next_sv = coro_deq (aTHX);
1030		1403
1031	/* nothing to schedule: call the idle handler */	1404	/* nothing to schedule: call the idle handler */
1032	if (!next_sv)	1405	if (expect_false (!next_sv))
1033	{	1406	{
1034	dSP;	1407	dSP;
1035	UNLOCK;	1408	UNLOCK;
1036		1409
1037	ENTER;	1410	ENTER;
1038	SAVETMPS;	1411	SAVETMPS;
1039		1412
1040	PUSHMARK (SP);	1413	PUSHMARK (SP);
1041	PUTBACK;	1414	PUTBACK;
1042	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1415	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1416	SPAGAIN;
1043		1417
1044	FREETMPS;	1418	FREETMPS;
1045	LEAVE;	1419	LEAVE;
1046	continue;	1420	continue;
1047	}	1421	}
1048		1422
1049	ta->next = SvSTATE (next_sv);	1423	ta->next = SvSTATE (next_sv);
1050		1424
1051	/* cannot transfer to destroyed coros, skip and look for next */	1425	/* cannot transfer to destroyed coros, skip and look for next */
1052	if (ta->next->flags & CF_DESTROYED)	1426	if (expect_false (ta->next->flags & CF_DESTROYED))
1053	{	1427	{
1054	UNLOCK;	1428	UNLOCK;
1055	SvREFCNT_dec (next_sv);	1429	SvREFCNT_dec (next_sv);
1056	/* coro_nready is already taken care of by destroy */	1430	/* coro_nready is already taken care of by destroy */
1057	continue;	1431	continue;
…		…
1062	break;	1436	break;
1063	}	1437	}
1064		1438
1065	/* free this only after the transfer */	1439	/* free this only after the transfer */
1066	prev_sv = SvRV (coro_current);	1440	prev_sv = SvRV (coro_current);
1067	SvRV_set (coro_current, next_sv);
1068	ta->prev = SvSTATE (prev_sv);	1441	ta->prev = SvSTATE (prev_sv);
1069		1442	TRANSFER_CHECK (*ta);
1070	assert (ta->next->flags & CF_READY);	1443	assert (ta->next->flags & CF_READY);
1071	ta->next->flags &= ~CF_READY;	1444	ta->next->flags &= ~CF_READY;
		1445	SvRV_set (coro_current, next_sv);
1072		1446
1073	LOCK;	1447	LOCK;
1074	free_coro_mortal ();	1448	free_coro_mortal (aTHX);
1075	coro_mortal = prev_sv;	1449	coro_mortal = prev_sv;
1076	UNLOCK;	1450	UNLOCK;
1077	}	1451	}
1078		1452
1079	static void	1453	static void
1080	prepare_cede (struct transfer_args *ta)	1454	prepare_cede (pTHX_ struct transfer_args *ta)
1081	{	1455	{
1082	api_ready (coro_current);	1456	api_ready (coro_current);
1083	prepare_schedule (ta);	1457	prepare_schedule (aTHX_ ta);
1084	}	1458	}
1085		1459
1086	static int	1460	static int
1087	prepare_cede_notself (struct transfer_args *ta)	1461	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1088	{	1462	{
1089	if (coro_nready)	1463	if (coro_nready)
1090	{	1464	{
1091	SV *prev = SvRV (coro_current);	1465	SV *prev = SvRV (coro_current);
1092	prepare_schedule (ta);	1466	prepare_schedule (aTHX_ ta);
1093	api_ready (prev);	1467	api_ready (prev);
1094	return 1;	1468	return 1;
1095	}	1469	}
1096	else	1470	else
1097	return 0;	1471	return 0;
1098	}	1472	}
1099		1473
1100	static void	1474	static void
1101	api_schedule (void)	1475	api_schedule (void)
1102	{	1476	{
		1477	dTHX;
1103	struct transfer_args ta;	1478	struct transfer_args ta;
1104		1479
1105	prepare_schedule (&ta);	1480	prepare_schedule (aTHX_ &ta);
1106	TRANSFER (ta);	1481	TRANSFER (ta);
1107	}	1482	}
1108		1483
1109	static int	1484	static int
1110	api_cede (void)	1485	api_cede (void)
1111	{	1486	{
		1487	dTHX;
1112	struct transfer_args ta;	1488	struct transfer_args ta;
1113		1489
1114	prepare_cede (&ta);	1490	prepare_cede (aTHX_ &ta);
1115		1491
1116	if (ta.prev != ta.next)	1492	if (expect_true (ta.prev != ta.next))
1117	{	1493	{
1118	TRANSFER (ta);	1494	TRANSFER (ta);
1119	return 1;	1495	return 1;
1120	}	1496	}
1121	else	1497	else
…		…
1123	}	1499	}
1124		1500
1125	static int	1501	static int
1126	api_cede_notself (void)	1502	api_cede_notself (void)
1127	{	1503	{
		1504	dTHX;
1128	struct transfer_args ta;	1505	struct transfer_args ta;
1129		1506
1130	if (prepare_cede_notself (&ta))	1507	if (prepare_cede_notself (aTHX_ &ta))
1131	{	1508	{
1132	TRANSFER (ta);	1509	TRANSFER (ta);
1133	return 1;	1510	return 1;
1134	}	1511	}
1135	else	1512	else
1136	return 0;	1513	return 0;
1137	}	1514	}
1138		1515
		1516	static void
		1517	api_trace (SV *coro_sv, int flags)
		1518	{
		1519	dTHX;
		1520	struct coro *coro = SvSTATE (coro_sv);
		1521
		1522	if (flags & CC_TRACE)
		1523	{
		1524	if (!coro->cctx)
		1525	coro->cctx = cctx_new ();
		1526	else if (!(coro->cctx->flags & CC_TRACE))
		1527	croak ("cannot enable tracing on coroutine with custom stack");
		1528
		1529	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1530	}
		1531	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1532	{
		1533	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1534
		1535	if (coro->flags & CF_RUNNING)
		1536	PL_runops = RUNOPS_DEFAULT;
		1537	else
		1538	coro->slot->runops = RUNOPS_DEFAULT;
		1539	}
		1540	}
		1541
1139	MODULE = Coro::State PACKAGE = Coro::State	1542	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1140		1543
1141	PROTOTYPES: DISABLE	1544	PROTOTYPES: DISABLE
1142		1545
1143	BOOT:	1546	BOOT:
1144	{	1547	{
1145	#ifdef USE_ITHREADS	1548	#ifdef USE_ITHREADS
1146	MUTEX_INIT (&coro_mutex);	1549	MUTEX_INIT (&coro_mutex);
1147	#endif	1550	#endif
1148	BOOT_PAGESIZE;	1551	BOOT_PAGESIZE;
1149		1552
		1553	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1554	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1555
		1556	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1557	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1558	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1559	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1560
		1561	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1562	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1563	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1564
1150	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1565	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1151		1566
		1567	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1568	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1152	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1569	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1153	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1154	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1155	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1156	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1570	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1157		1571
1158	main_mainstack = PL_mainstack;	1572	main_mainstack = PL_mainstack;
		1573	main_top_env = PL_top_env;
		1574
		1575	while (main_top_env->je_prev)
		1576	main_top_env = main_top_env->je_prev;
1159		1577
1160	coroapi.ver = CORO_API_VERSION;	1578	coroapi.ver = CORO_API_VERSION;
		1579	coroapi.rev = CORO_API_REVISION;
1161	coroapi.transfer = api_transfer;	1580	coroapi.transfer = api_transfer;
1162		1581
1163	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1582	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1164	}	1583	}
1165		1584
1166	SV *	1585	SV *
1167	new (char *klass, ...)	1586	new (char *klass, ...)
1168	CODE:	1587	CODE:
1169	{	1588	{
1170	struct coro *coro;	1589	struct coro *coro;
		1590	MAGIC *mg;
1171	HV *hv;	1591	HV *hv;
1172	int i;	1592	int i;
1173		1593
1174	Newz (0, coro, 1, struct coro);	1594	Newz (0, coro, 1, struct coro);
1175	coro->args = newAV ();	1595	coro->args = newAV ();
1176	coro->save = CORO_SAVE_ALL;
1177	coro->flags = CF_NEW;	1596	coro->flags = CF_NEW;
1178		1597
		1598	if (coro_first) coro_first->prev = coro;
		1599	coro->next = coro_first;
		1600	coro_first = coro;
		1601
1179	hv = newHV ();	1602	coro->hv = hv = newHV ();
1180	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1603	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1604	mg->mg_flags |= MGf_DUP;
1181	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1605	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1182		1606
		1607	av_extend (coro->args, items - 1);
1183	for (i = 1; i < items; i++)	1608	for (i = 1; i < items; i++)
1184	av_push (coro->args, newSVsv (ST (i)));	1609	av_push (coro->args, newSVsv (ST (i)));
1185	}	1610	}
1186	OUTPUT:	1611	OUTPUT:
1187	RETVAL	1612	RETVAL
1188		1613
1189	int	1614	# these not obviously related functions are all rolled into the same xs
1190	save (SV *coro, int new_save = -1)	1615	# function to increase chances that they all will call transfer with the same
1191	CODE:	1616	# stack offset
1192	RETVAL = api_save (coro, new_save);
1193	OUTPUT:
1194	RETVAL
1195
1196	void	1617	void
1197	_set_stacklevel (...)	1618	_set_stacklevel (...)
1198	ALIAS:	1619	ALIAS:
1199	Coro::State::transfer = 1	1620	Coro::State::transfer = 1
1200	Coro::schedule = 2	1621	Coro::schedule = 2
…		…
1202	Coro::cede_notself = 4	1623	Coro::cede_notself = 4
1203	CODE:	1624	CODE:
1204	{	1625	{
1205	struct transfer_args ta;	1626	struct transfer_args ta;
1206		1627
		1628	PUTBACK;
1207	switch (ix)	1629	switch (ix)
1208	{	1630	{
1209	case 0:	1631	case 0:
1210	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1632	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1211	ta.next = 0;	1633	ta.next = 0;
…		…
1213		1635
1214	case 1:	1636	case 1:
1215	if (items != 2)	1637	if (items != 2)
1216	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1638	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1217		1639
1218	prepare_transfer (&ta, ST (0), ST (1));	1640	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1219	break;	1641	break;
1220		1642
1221	case 2:	1643	case 2:
1222	prepare_schedule (&ta);	1644	prepare_schedule (aTHX_ &ta);
1223	break;	1645	break;
1224		1646
1225	case 3:	1647	case 3:
1226	prepare_cede (&ta);	1648	prepare_cede (aTHX_ &ta);
1227	break;	1649	break;
1228		1650
1229	case 4:	1651	case 4:
1230	if (!prepare_cede_notself (&ta))	1652	if (!prepare_cede_notself (aTHX_ &ta))
1231	XSRETURN_EMPTY;	1653	XSRETURN_EMPTY;
1232		1654
1233	break;	1655	break;
1234	}	1656	}
		1657	SPAGAIN;
1235		1658
1236	BARRIER;	1659	BARRIER;
		1660	PUTBACK;
1237	TRANSFER (ta);	1661	TRANSFER (ta);
1238		1662	SPAGAIN; /* might be the sp of a different coroutine now */
1239	if (GIMME_V != G_VOID && ta.next != ta.prev)	1663	/* be extra careful not to ever do anything after TRANSFER */
1240	XSRETURN_YES;
1241	}	1664	}
1242		1665
1243	bool	1666	bool
1244	_destroy (SV *coro_sv)	1667	_destroy (SV *coro_sv)
1245	CODE:	1668	CODE:
1246	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1669	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1247	OUTPUT:	1670	OUTPUT:
1248	RETVAL	1671	RETVAL
1249		1672
1250	void	1673	void
1251	_exit (code)	1674	_exit (code)
…		…
1275	CODE:	1698	CODE:
1276	RETVAL = cctx_idle;	1699	RETVAL = cctx_idle;
1277	OUTPUT:	1700	OUTPUT:
1278	RETVAL	1701	RETVAL
1279		1702
		1703	void
		1704	list ()
		1705	PPCODE:
		1706	{
		1707	struct coro *coro;
		1708	for (coro = coro_first; coro; coro = coro->next)
		1709	if (coro->hv)
		1710	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1711	}
		1712
		1713	void
		1714	call (Coro::State coro, SV *coderef)
		1715	ALIAS:
		1716	eval = 1
		1717	CODE:
		1718	{
		1719	if (coro->mainstack)
		1720	{
		1721	struct coro temp;
		1722
		1723	if (!(coro->flags & CF_RUNNING))
		1724	{
		1725	PUTBACK;
		1726	save_perl (aTHX_ &temp);
		1727	load_perl (aTHX_ coro);
		1728	}
		1729
		1730	{
		1731	dSP;
		1732	ENTER;
		1733	SAVETMPS;
		1734	PUTBACK;
		1735	PUSHSTACK;
		1736	PUSHMARK (SP);
		1737
		1738	if (ix)
		1739	eval_sv (coderef, 0);
		1740	else
		1741	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1742
		1743	POPSTACK;
		1744	SPAGAIN;
		1745	FREETMPS;
		1746	LEAVE;
		1747	PUTBACK;
		1748	}
		1749
		1750	if (!(coro->flags & CF_RUNNING))
		1751	{
		1752	save_perl (aTHX_ coro);
		1753	load_perl (aTHX_ &temp);
		1754	SPAGAIN;
		1755	}
		1756	}
		1757	}
		1758
		1759	SV *
		1760	is_ready (Coro::State coro)
		1761	PROTOTYPE: $
		1762	ALIAS:
		1763	is_ready = CF_READY
		1764	is_running = CF_RUNNING
		1765	is_new = CF_NEW
		1766	is_destroyed = CF_DESTROYED
		1767	CODE:
		1768	RETVAL = boolSV (coro->flags & ix);
		1769	OUTPUT:
		1770	RETVAL
		1771
		1772	void
		1773	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1774
		1775	SV *
		1776	has_stack (Coro::State coro)
		1777	PROTOTYPE: $
		1778	CODE:
		1779	RETVAL = boolSV (!!coro->cctx);
		1780	OUTPUT:
		1781	RETVAL
		1782
		1783	int
		1784	is_traced (Coro::State coro)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1788	OUTPUT:
		1789	RETVAL
		1790
		1791	IV
		1792	rss (Coro::State coro)
		1793	PROTOTYPE: $
		1794	ALIAS:
		1795	usecount = 1
		1796	CODE:
		1797	switch (ix)
		1798	{
		1799	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1800	case 1: RETVAL = coro->usecount; break;
		1801	}
		1802	OUTPUT:
		1803	RETVAL
		1804
		1805
1280	MODULE = Coro::State PACKAGE = Coro	1806	MODULE = Coro::State PACKAGE = Coro
1281		1807
1282	BOOT:	1808	BOOT:
1283	{	1809	{
1284	int i;	1810	int i;
1285		1811
		1812	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1813	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1814	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1815
		1816	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1817	SvREADONLY_on (coro_current);
		1818
1286	coro_stash = gv_stashpv ("Coro", TRUE);	1819	coro_stash = gv_stashpv ("Coro", TRUE);
1287		1820
1288	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1821	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1289	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1822	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1290	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1823	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1291	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1824	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1292	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1825	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1293	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1826	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1294		1827
1295	coro_current = get_sv ("Coro::current", FALSE);
1296	SvREADONLY_on (coro_current);
1297
1298	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1828	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1299	coro_ready[i] = newAV ();	1829	coro_ready[i] = newAV ();
1300		1830
1301	{	1831	{
1302	SV *sv = perl_get_sv("Coro::API", 1);	1832	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1833	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1303		1834
1304	coroapi.schedule = api_schedule;	1835	coroapi.schedule = api_schedule;
1305	coroapi.save = api_save;
1306	coroapi.cede = api_cede;	1836	coroapi.cede = api_cede;
1307	coroapi.cede_notself = api_cede_notself;	1837	coroapi.cede_notself = api_cede_notself;
1308	coroapi.ready = api_ready;	1838	coroapi.ready = api_ready;
1309	coroapi.is_ready = api_is_ready;	1839	coroapi.is_ready = api_is_ready;
1310	coroapi.nready = &coro_nready;	1840	coroapi.nready = &coro_nready;
…		…
1351	CODE:	1881	CODE:
1352	RETVAL = boolSV (api_ready (self));	1882	RETVAL = boolSV (api_ready (self));
1353	OUTPUT:	1883	OUTPUT:
1354	RETVAL	1884	RETVAL
1355		1885
1356	SV *
1357	is_ready (SV *self)
1358	PROTOTYPE: $
1359	CODE:
1360	RETVAL = boolSV (api_is_ready (self));
1361	OUTPUT:
1362	RETVAL
1363
1364	int	1886	int
1365	nready (...)	1887	nready (...)
1366	PROTOTYPE:	1888	PROTOTYPE:
1367	CODE:	1889	CODE:
1368	RETVAL = coro_nready;	1890	RETVAL = coro_nready;
1369	OUTPUT:	1891	OUTPUT:
1370	RETVAL	1892	RETVAL
1371		1893
		1894	void
		1895	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1896	PROTOTYPE: $;$
		1897	CODE:
		1898	SvREFCNT_dec (self->throw);
		1899	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1900
		1901	# for async_pool speedup
		1902	void
		1903	_pool_1 (SV *cb)
		1904	CODE:
		1905	{
		1906	struct coro *coro = SvSTATE (coro_current);
		1907	HV *hv = (HV *)SvRV (coro_current);
		1908	AV *defav = GvAV (PL_defgv);
		1909	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1910	AV *invoke_av;
		1911	int i, len;
		1912
		1913	if (!invoke)
		1914	{
		1915	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1916	croak ("\3async_pool terminate\2\n");
		1917	}
		1918
		1919	SvREFCNT_dec (coro->saved_deffh);
		1920	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1921
		1922	hv_store (hv, "desc", sizeof ("desc") - 1,
		1923	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1924
		1925	invoke_av = (AV *)SvRV (invoke);
		1926	len = av_len (invoke_av);
		1927
		1928	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1929
		1930	if (len > 0)
		1931	{
		1932	av_fill (defav, len - 1);
		1933	for (i = 0; i < len; ++i)
		1934	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1935	}
		1936
		1937	SvREFCNT_dec (invoke);
		1938	}
		1939
		1940	void
		1941	_pool_2 (SV *cb)
		1942	CODE:
		1943	{
		1944	struct coro *coro = SvSTATE (coro_current);
		1945
		1946	sv_setsv (cb, &PL_sv_undef);
		1947
		1948	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1949	coro->saved_deffh = 0;
		1950
		1951	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1952	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1953	{
		1954	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1955	croak ("\3async_pool terminate\2\n");
		1956	}
		1957
		1958	av_clear (GvAV (PL_defgv));
		1959	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1960	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1961
		1962	coro->prio = 0;
		1963
		1964	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1965	api_trace (coro_current, 0);
		1966
		1967	av_push (av_async_pool, newSVsv (coro_current));
		1968	}
		1969
		1970
1372	MODULE = Coro::State PACKAGE = Coro::AIO	1971	MODULE = Coro::State PACKAGE = Coro::AIO
1373		1972
1374	SV *	1973	SV *
1375	_get_state ()	1974	_get_state ()
1376	CODE:	1975	CODE:

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