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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 1.215 by root, Sun Oct 14 19:34:09 2007 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 SV *coro_mortal; /* will be freed after next transfer */
134		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;
		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
281		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))
		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	#if 0
		670	static int (*orig_sigelem_get) (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	*/
534	static void	681	static int
535	setup_coro (struct coro *coro)	682	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		683	{
		684	return orig_sigelem_get (aTHX_ sv, mg);
		685	const char *s = MgPV_nolen_const (mg);
		686
		687	if (*s == '_')
		688	{
		689	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		690	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		691	}
		692
		693	return orig_sigelem_get (aTHX_ sv, mg);
		694	}
		695	#endif
		696
		697	static void
		698	coro_setup (pTHX_ struct coro *coro)
536	{	699	{
537	/*	700	/*
538	* emulate part of the perl startup here.	701	* emulate part of the perl startup here.
539	*/	702	*/
540
541	coro_init_stacks ();	703	coro_init_stacks (aTHX);
542		704
		705	PL_runops = RUNOPS_DEFAULT;
543	PL_curcop = &PL_compiling;	706	PL_curcop = &PL_compiling;
544	PL_in_eval = EVAL_NULL;	707	PL_in_eval = EVAL_NULL;
545	PL_comppad = 0;	708	PL_comppad = 0;
546	PL_curpm = 0;	709	PL_curpm = 0;
		710	PL_curpad = 0;
547	PL_localizing = 0;	711	PL_localizing = 0;
548	PL_dirty = 0;	712	PL_dirty = 0;
549	PL_restartop = 0;	713	PL_restartop = 0;
550		714
		715	/* recreate the die/warn hooks */
		716	PL_diehook = 0;
		717	hv_store (hv_sig, "__DIE__", sizeof ("__DIE__") - 1, newSV (0), 0);
		718	PL_diehook = SvREFCNT_inc (rv_diehook);
		719
		720	PL_warnhook = 0;
		721	hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, newSV (0), 0);
		722	PL_warnhook = SvREFCNT_inc (rv_warnhook);
		723
		724	GvSV (PL_defgv) = newSV (0);
		725	GvAV (PL_defgv) = coro->args; coro->args = 0;
		726	GvSV (PL_errgv) = newSV (0);
		727	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		728	PL_rs = newSVsv (GvSV (irsgv));
		729	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		730
551	{	731	{
552	dSP;	732	dSP;
553	LOGOP myop;	733	LOGOP myop;
554		734
555	SvREFCNT_dec (GvAV (PL_defgv));
556	GvAV (PL_defgv) = coro->args; coro->args = 0;
557
558	Zero (&myop, 1, LOGOP);	735	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	736	myop.op_next = Nullop;
560	myop.op_flags = OPf_WANT_VOID;	737	myop.op_flags = OPf_WANT_VOID;
561		738
562	PUSHMARK (SP);	739	PUSHMARK (SP);
563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	740	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
564	PUTBACK;	741	PUTBACK;
565	PL_op = (OP *)&myop;	742	PL_op = (OP *)&myop;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	743	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	744	SPAGAIN;
568	}	745	}
569		746
570	ENTER; /* necessary e.g. for dounwind */	747	/* this newly created coroutine might be run on an existing cctx which most
		748	* likely was suspended in set_stacklevel, called from entersub.
		749	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		750	* so we ENTER here for symmetry
		751	*/
		752	ENTER;
571	}	753	}
572		754
573	static void	755	static void
		756	coro_destroy (pTHX_ struct coro *coro)
		757	{
		758	if (!IN_DESTRUCT)
		759	{
		760	/* restore all saved variables and stuff */
		761	LEAVE_SCOPE (0);
		762	assert (PL_tmps_floor == -1);
		763
		764	/* free all temporaries */
		765	FREETMPS;
		766	assert (PL_tmps_ix == -1);
		767
		768	/* unwind all extra stacks */
		769	POPSTACK_TO (PL_mainstack);
		770
		771	/* unwind main stack */
		772	dounwind (-1);
		773	}
		774
		775	SvREFCNT_dec (GvSV (PL_defgv));
		776	SvREFCNT_dec (GvAV (PL_defgv));
		777	SvREFCNT_dec (GvSV (PL_errgv));
		778	SvREFCNT_dec (PL_defoutgv);
		779	SvREFCNT_dec (PL_rs);
		780	SvREFCNT_dec (GvSV (irsgv));
		781
		782	SvREFCNT_dec (PL_diehook);
		783	SvREFCNT_dec (PL_warnhook);
		784
		785	SvREFCNT_dec (coro->saved_deffh);
		786	SvREFCNT_dec (coro->throw);
		787
		788	coro_destroy_stacks (aTHX);
		789	}
		790
		791	static void
574	free_coro_mortal ()	792	free_coro_mortal (pTHX)
575	{	793	{
576	if (coro_mortal)	794	if (expect_true (coro_mortal))
577	{	795	{
578	SvREFCNT_dec (coro_mortal);	796	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;	797	coro_mortal = 0;
580	}	798	}
581	}	799	}
582		800
		801	static int
		802	runops_trace (pTHX)
		803	{
		804	COP *oldcop = 0;
		805	int oldcxix = -2;
		806	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		807	coro_cctx *cctx = coro->cctx;
		808
		809	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		810	{
		811	PERL_ASYNC_CHECK ();
		812
		813	if (cctx->flags & CC_TRACE_ALL)
		814	{
		815	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		816	{
		817	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		818	SV **bot, **top;
		819	AV *av = newAV (); /* return values */
		820	SV **cb;
		821	dSP;
		822
		823	GV *gv = CvGV (cx->blk_sub.cv);
		824	SV *fullname = sv_2mortal (newSV (0));
		825	if (isGV (gv))
		826	gv_efullname3 (fullname, gv, 0);
		827
		828	bot = PL_stack_base + cx->blk_oldsp + 1;
		829	top = cx->blk_gimme == G_ARRAY ? SP + 1
		830	: cx->blk_gimme == G_SCALAR ? bot + 1
		831	: bot;
		832
		833	av_extend (av, top - bot);
		834	while (bot < top)
		835	av_push (av, SvREFCNT_inc (*bot++));
		836
		837	PL_runops = RUNOPS_DEFAULT;
		838	ENTER;
		839	SAVETMPS;
		840	EXTEND (SP, 3);
		841	PUSHMARK (SP);
		842	PUSHs (&PL_sv_no);
		843	PUSHs (fullname);
		844	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		845	PUTBACK;
		846	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		847	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		848	SPAGAIN;
		849	FREETMPS;
		850	LEAVE;
		851	PL_runops = runops_trace;
		852	}
		853
		854	if (oldcop != PL_curcop)
		855	{
		856	oldcop = PL_curcop;
		857
		858	if (PL_curcop != &PL_compiling)
		859	{
		860	SV **cb;
		861
		862	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		863	{
		864	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		865
		866	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		867	{
		868	runops_proc_t old_runops = PL_runops;
		869	dSP;
		870	GV *gv = CvGV (cx->blk_sub.cv);
		871	SV *fullname = sv_2mortal (newSV (0));
		872
		873	if (isGV (gv))
		874	gv_efullname3 (fullname, gv, 0);
		875
		876	PL_runops = RUNOPS_DEFAULT;
		877	ENTER;
		878	SAVETMPS;
		879	EXTEND (SP, 3);
		880	PUSHMARK (SP);
		881	PUSHs (&PL_sv_yes);
		882	PUSHs (fullname);
		883	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		884	PUTBACK;
		885	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		886	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		887	SPAGAIN;
		888	FREETMPS;
		889	LEAVE;
		890	PL_runops = runops_trace;
		891	}
		892
		893	oldcxix = cxstack_ix;
		894	}
		895
		896	if (cctx->flags & CC_TRACE_LINE)
		897	{
		898	dSP;
		899
		900	PL_runops = RUNOPS_DEFAULT;
		901	ENTER;
		902	SAVETMPS;
		903	EXTEND (SP, 3);
		904	PL_runops = RUNOPS_DEFAULT;
		905	PUSHMARK (SP);
		906	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		907	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		908	PUTBACK;
		909	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		910	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		911	SPAGAIN;
		912	FREETMPS;
		913	LEAVE;
		914	PL_runops = runops_trace;
		915	}
		916	}
		917	}
		918	}
		919	}
		920
		921	TAINT_NOT;
		922	return 0;
		923	}
		924
583	/* inject a fake call to Coro::State::_cctx_init into the execution */	925	/* inject a fake call to Coro::State::_cctx_init into the execution */
		926	/* _cctx_init should be careful, as it could be called at almost any time */
		927	/* during execution of a perl program */
584	static void NOINLINE	928	static void NOINLINE
585	prepare_cctx (coro_cctx *cctx)	929	cctx_prepare (pTHX_ coro_cctx *cctx)
586	{	930	{
587	dSP;	931	dSP;
588	LOGOP myop;	932	LOGOP myop;
		933
		934	PL_top_env = &PL_start_env;
		935
		936	if (cctx->flags & CC_TRACE)
		937	PL_runops = runops_trace;
589		938
590	Zero (&myop, 1, LOGOP);	939	Zero (&myop, 1, LOGOP);
591	myop.op_next = PL_op;	940	myop.op_next = PL_op;
592	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	941	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
593		942
…		…
599	PL_op = (OP *)&myop;	948	PL_op = (OP *)&myop;
600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	949	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
601	SPAGAIN;	950	SPAGAIN;
602	}	951	}
603		952
		953	/*
		954	* this is a _very_ stripped down perl interpreter ;)
		955	*/
604	static void	956	static void
605	coro_run (void *arg)	957	cctx_run (void *arg)
606	{	958	{
		959	dTHX;
		960
607	/* coro_run is the alternative tail of transfer(), so unlock here. */	961	/* cctx_run is the alternative tail of transfer(), so unlock here. */
608	UNLOCK;	962	UNLOCK;
609		963
610	/*	964	/* we now skip the entersub that lead to transfer() */
611	* this is a _very_ stripped down perl interpreter ;)	965	PL_op = PL_op->op_next;
612	*/
613	PL_top_env = &PL_start_env;
614		966
615	/* inject call to cctx_init */	967	/* inject a fake subroutine call to cctx_init */
616	prepare_cctx ((coro_cctx *)arg);	968	cctx_prepare (aTHX_ (coro_cctx *)arg);
617		969
618	/* somebody will hit me for both perl_run and PL_restartop */	970	/* somebody or something will hit me for both perl_run and PL_restartop */
619	PL_restartop = PL_op;	971	PL_restartop = PL_op;
620	perl_run (PL_curinterp);	972	perl_run (PL_curinterp);
621		973
622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	974	/*
623	abort ();	975	* If perl-run returns we assume exit() was being called or the coro
		976	* fell off the end, which seems to be the only valid (non-bug)
		977	* reason for perl_run to return. We try to exit by jumping to the
		978	* bootstrap-time "top" top_env, as we cannot restore the "main"
		979	* coroutine as Coro has no such concept
		980	*/
		981	PL_top_env = main_top_env;
		982	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
624	}	983	}
625		984
626	static coro_cctx *	985	static coro_cctx *
627	cctx_new ()	986	cctx_new ()
628	{	987	{
…		…
633	++cctx_count;	992	++cctx_count;
634		993
635	Newz (0, cctx, 1, coro_cctx);	994	Newz (0, cctx, 1, coro_cctx);
636		995
637	#if HAVE_MMAP	996	#if HAVE_MMAP
638
639	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	997	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640	/* mmap supposedly does allocate-on-write for us */	998	/* 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);	999	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
642		1000
643	if (cctx->sptr != (void *)-1)	1001	if (cctx->sptr != (void *)-1)
…		…
645	# if CORO_STACKGUARD	1003	# if CORO_STACKGUARD
646	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1004	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
647	# endif	1005	# endif
648	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1006	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
649	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1007	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
650	cctx->mapped = 1;	1008	cctx->flags |= CC_MAPPED;
651	}	1009	}
652	else	1010	else
653	#endif	1011	#endif
654	{	1012	{
655	cctx->ssize = coro_stacksize * (long)sizeof (long);	1013	cctx->ssize = coro_stacksize * (long)sizeof (long);
…		…
664	stack_start = cctx->sptr;	1022	stack_start = cctx->sptr;
665	stack_size = cctx->ssize;	1023	stack_size = cctx->ssize;
666	}	1024	}
667		1025
668	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1026	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
669	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);	1027	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
670		1028
671	return cctx;	1029	return cctx;
672	}	1030	}
673		1031
674	static void	1032	static void
…		…
682	#if CORO_USE_VALGRIND	1040	#if CORO_USE_VALGRIND
683	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1041	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
684	#endif	1042	#endif
685		1043
686	#if HAVE_MMAP	1044	#if HAVE_MMAP
687	if (cctx->mapped)	1045	if (cctx->flags & CC_MAPPED)
688	munmap (cctx->sptr, cctx->ssize);	1046	munmap (cctx->sptr, cctx->ssize);
689	else	1047	else
690	#endif	1048	#endif
691	Safefree (cctx->sptr);	1049	Safefree (cctx->sptr);
692		1050
693	Safefree (cctx);	1051	Safefree (cctx);
694	}	1052	}
695		1053
		1054	/* wether this cctx should be destructed */
		1055	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1056
696	static coro_cctx *	1057	static coro_cctx *
697	cctx_get ()	1058	cctx_get (pTHX)
698	{	1059	{
699	while (cctx_first)	1060	while (expect_true (cctx_first))
700	{	1061	{
701	coro_cctx *cctx = cctx_first;	1062	coro_cctx *cctx = cctx_first;
702	cctx_first = cctx->next;	1063	cctx_first = cctx->next;
703	--cctx_idle;	1064	--cctx_idle;
704		1065
705	if (cctx->ssize >= coro_stacksize)	1066	if (expect_true (!CCTX_EXPIRED (cctx)))
706	return cctx;	1067	return cctx;
707		1068
708	cctx_destroy (cctx);	1069	cctx_destroy (cctx);
709	}	1070	}
710		1071
711	PL_op = PL_op->op_next;
712	return cctx_new ();	1072	return cctx_new ();
713	}	1073	}
714		1074
715	static void	1075	static void
716	cctx_put (coro_cctx *cctx)	1076	cctx_put (coro_cctx *cctx)
717	{	1077	{
718	/* free another cctx if overlimit */	1078	/* free another cctx if overlimit */
719	if (cctx_idle >= MAX_IDLE_CCTX)	1079	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
720	{	1080	{
721	coro_cctx *first = cctx_first;	1081	coro_cctx *first = cctx_first;
722	cctx_first = first->next;	1082	cctx_first = first->next;
723	--cctx_idle;	1083	--cctx_idle;
724		1084
725	assert (!first->inuse);
726	cctx_destroy (first);	1085	cctx_destroy (first);
727	}	1086	}
728		1087
729	++cctx_idle;	1088	++cctx_idle;
730	cctx->next = cctx_first;	1089	cctx->next = cctx_first;
731	cctx_first = cctx;	1090	cctx_first = cctx;
732	}	1091	}
733		1092
734	/** coroutine switching *****************************************************/	1093	/** coroutine switching *****************************************************/
735		1094
736	/* never call directly, always through the coro_state_transfer global variable */	1095	static void
		1096	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1097	{
		1098	if (expect_true (prev != next))
		1099	{
		1100	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1101	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1102
		1103	if (expect_false (next->flags & CF_RUNNING))
		1104	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1105
		1106	if (expect_false (next->flags & CF_DESTROYED))
		1107	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1108
		1109	if (
		1110	#if PERL_VERSION_ATLEAST (5,9,0)
		1111	expect_false (PL_parser)
		1112	#else
		1113	expect_false (PL_lex_state != LEX_NOTPARSING)
		1114	#endif
		1115	)
		1116	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1117	}
		1118	}
		1119
		1120	/* always use the TRANSFER macro */
737	static void NOINLINE	1121	static void NOINLINE
738	transfer (struct coro *prev, struct coro *next)	1122	transfer (pTHX_ struct coro *prev, struct coro *next)
739	{	1123	{
740	dSTACKLEVEL;	1124	dSTACKLEVEL;
741		1125
742	/* sometimes transfer is only called to set idle_sp */	1126	/* sometimes transfer is only called to set idle_sp */
743	if (!next)	1127	if (expect_false (!next))
744	{	1128	{
745	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1129	((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 */	1130	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747	}	1131	}
748	else if (prev != next)	1132	else if (expect_true (prev != next))
749	{	1133	{
750	coro_cctx *prev__cctx;	1134	coro_cctx *prev__cctx;
751		1135
752	if (prev->flags & CF_NEW)	1136	if (expect_false (prev->flags & CF_NEW))
753	{	1137	{
754	/* create a new empty context */	1138	/* create a new empty context */
755	Newz (0, prev->cctx, 1, coro_cctx);	1139	Newz (0, prev->cctx, 1, coro_cctx);
756	prev->cctx->inuse = 1;
757	prev->flags &= ~CF_NEW;	1140	prev->flags &= ~CF_NEW;
758	prev->flags |= CF_RUNNING;	1141	prev->flags |= CF_RUNNING;
759	}	1142	}
760		1143
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;	1144	prev->flags &= ~CF_RUNNING;
772	next->flags |= CF_RUNNING;	1145	next->flags |= CF_RUNNING;
773		1146
774	LOCK;	1147	LOCK;
775		1148
		1149	/* first get rid of the old state */
		1150	save_perl (aTHX_ prev);
		1151
776	if (next->flags & CF_NEW)	1152	if (expect_false (next->flags & CF_NEW))
777	{	1153	{
778	/* need to start coroutine */	1154	/* need to start coroutine */
779	next->flags &= ~CF_NEW;	1155	next->flags &= ~CF_NEW;
780	/* first get rid of the old state */
781	save_perl (prev);
782	/* setup coroutine call */	1156	/* setup coroutine call */
783	setup_coro (next);	1157	coro_setup (aTHX_ next);
784	/* need a new stack */
785	assert (!next->cctx);
786	}	1158	}
787	else	1159	else
788	{
789	/* coroutine already started */
790	save_perl (prev);
791	load_perl (next);	1160	load_perl (aTHX_ next);
792	}
793		1161
794	prev__cctx = prev->cctx;	1162	prev__cctx = prev->cctx;
795		1163
796	/* possibly "free" the cctx */	1164	/* possibly "free" the cctx */
797	if (prev__cctx->idle_sp == STACKLEVEL)	1165	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
798	{	1166	{
799	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1167	/* 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));	1168	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
801		1169
802	prev->cctx = 0;	1170	prev->cctx = 0;
803		1171
		1172	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1173	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1174	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1175	if (!next->cctx)
		1176	next->cctx = cctx_get (aTHX);
		1177
804	cctx_put (prev__cctx);	1178	cctx_put (prev__cctx);
805	prev__cctx->inuse = 0;
806	}	1179	}
807		1180
		1181	++next->usecount;
		1182
808	if (!next->cctx)	1183	if (expect_true (!next->cctx))
809	{
810	next->cctx = cctx_get ();	1184	next->cctx = cctx_get (aTHX);
811	assert (!next->cctx->inuse);
812	next->cctx->inuse = 1;
813	}
814		1185
815	if (prev__cctx != next->cctx)	1186	if (expect_false (prev__cctx != next->cctx))
816	{	1187	{
817	prev__cctx->top_env = PL_top_env;	1188	prev__cctx->top_env = PL_top_env;
818	PL_top_env = next->cctx->top_env;	1189	PL_top_env = next->cctx->top_env;
819	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1190	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
820	}	1191	}
821		1192
822	free_coro_mortal ();	1193	free_coro_mortal (aTHX);
823	UNLOCK;	1194	UNLOCK;
		1195
		1196	if (expect_false (prev->throw || next->throw))
		1197	{
		1198	struct coro *coro = SvSTATE (coro_current);
		1199
		1200	if (coro->throw)
		1201	{
		1202	SV *exception = coro->throw;
		1203	coro->throw = 0;
		1204	sv_setsv (ERRSV, exception);
		1205	croak (0);
		1206	}
		1207	}
824	}	1208	}
825	}	1209	}
826		1210
827	struct transfer_args	1211	struct transfer_args
828	{	1212	{
829	struct coro *prev, *next;	1213	struct coro *prev, *next;
830	};	1214	};
831		1215
832	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1216	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1217	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
833		1218
834	/** high level stuff ********************************************************/	1219	/** high level stuff ********************************************************/
835		1220
836	static int	1221	static int
837	coro_state_destroy (struct coro *coro)	1222	coro_state_destroy (pTHX_ struct coro *coro)
838	{	1223	{
839	if (coro->flags & CF_DESTROYED)	1224	if (coro->flags & CF_DESTROYED)
840	return 0;	1225	return 0;
841		1226
842	coro->flags |= CF_DESTROYED;	1227	coro->flags |= CF_DESTROYED;
…		…
854		1239
855	if (coro->mainstack && coro->mainstack != main_mainstack)	1240	if (coro->mainstack && coro->mainstack != main_mainstack)
856	{	1241	{
857	struct coro temp;	1242	struct coro temp;
858		1243
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)	1244	if (coro->flags & CF_RUNNING)
865	croak ("FATAL: tried to destroy currently running coroutine");	1245	croak ("FATAL: tried to destroy currently running coroutine");
866		1246
867	save_perl (&temp);	1247	save_perl (aTHX_ &temp);
868	load_perl (coro);	1248	load_perl (aTHX_ coro);
869		1249
870	coro_destroy_stacks ();	1250	coro_destroy (aTHX_ coro);
871		1251
872	load_perl (&temp); /* this will get rid of defsv etc.. */	1252	load_perl (aTHX_ &temp);
873		1253
874	coro->mainstack = 0;	1254	coro->slot = 0;
875	}	1255	}
876		1256
877	cctx_destroy (coro->cctx);	1257	cctx_destroy (coro->cctx);
878	SvREFCNT_dec (coro->args);	1258	SvREFCNT_dec (coro->args);
879		1259
		1260	if (coro->next) coro->next->prev = coro->prev;
		1261	if (coro->prev) coro->prev->next = coro->next;
		1262	if (coro == coro_first) coro_first = coro->next;
		1263
880	return 1;	1264	return 1;
881	}	1265	}
882		1266
883	static int	1267	static int
884	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1268	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
885	{	1269	{
886	struct coro *coro = (struct coro *)mg->mg_ptr;	1270	struct coro *coro = (struct coro *)mg->mg_ptr;
887	mg->mg_ptr = 0;	1271	mg->mg_ptr = 0;
888		1272
		1273	coro->hv = 0;
		1274
889	if (--coro->refcnt < 0)	1275	if (--coro->refcnt < 0)
890	{	1276	{
891	coro_state_destroy (coro);	1277	coro_state_destroy (aTHX_ coro);
892	Safefree (coro);	1278	Safefree (coro);
893	}	1279	}
894		1280
895	return 0;	1281	return 0;
896	}	1282	}
…		…
914	#else	1300	#else
915	# define MGf_DUP 0	1301	# define MGf_DUP 0
916	#endif	1302	#endif
917	};	1303	};
918		1304
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	1305	static void
941	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1306	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
942	{	1307	{
943	ta->prev = SvSTATE (prev_sv);	1308	ta->prev = SvSTATE (prev_sv);
944	ta->next = SvSTATE (next_sv);	1309	ta->next = SvSTATE (next_sv);
		1310	TRANSFER_CHECK (*ta);
945	}	1311	}
946		1312
947	static void	1313	static void
948	api_transfer (SV *prev_sv, SV *next_sv)	1314	api_transfer (SV *prev_sv, SV *next_sv)
949	{	1315	{
		1316	dTHX;
950	struct transfer_args ta;	1317	struct transfer_args ta;
951		1318
952	prepare_transfer (&ta, prev_sv, next_sv);	1319	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
953	TRANSFER (ta);	1320	TRANSFER (ta);
954	}	1321	}
955		1322
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 ********************************************************************/	1323	/** Coro ********************************************************************/
969		1324
970	static void	1325	static void
971	coro_enq (SV *coro_sv)	1326	coro_enq (pTHX_ SV *coro_sv)
972	{	1327	{
973	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1328	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
974	}	1329	}
975		1330
976	static SV *	1331	static SV *
977	coro_deq (int min_prio)	1332	coro_deq (pTHX_ int min_prio)
978	{	1333	{
979	int prio = PRIO_MAX - PRIO_MIN;	1334	int prio = PRIO_MAX - PRIO_MIN;
980		1335
981	min_prio -= PRIO_MIN;	1336	min_prio -= PRIO_MIN;
982	if (min_prio < 0)	1337	if (min_prio < 0)
…		…
990	}	1345	}
991		1346
992	static int	1347	static int
993	api_ready (SV *coro_sv)	1348	api_ready (SV *coro_sv)
994	{	1349	{
		1350	dTHX;
995	struct coro *coro;	1351	struct coro *coro;
996		1352
997	if (SvROK (coro_sv))	1353	if (SvROK (coro_sv))
998	coro_sv = SvRV (coro_sv);	1354	coro_sv = SvRV (coro_sv);
999		1355
…		…
1003	return 0;	1359	return 0;
1004		1360
1005	coro->flags |= CF_READY;	1361	coro->flags |= CF_READY;
1006		1362
1007	LOCK;	1363	LOCK;
1008	coro_enq (SvREFCNT_inc (coro_sv));	1364	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1009	++coro_nready;	1365	++coro_nready;
1010	UNLOCK;	1366	UNLOCK;
1011		1367
1012	return 1;	1368	return 1;
1013	}	1369	}
1014		1370
1015	static int	1371	static int
1016	api_is_ready (SV *coro_sv)	1372	api_is_ready (SV *coro_sv)
1017	{	1373	{
		1374	dTHX;
1018	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1375	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1019	}	1376	}
1020		1377
1021	static void	1378	static void
1022	prepare_schedule (struct transfer_args *ta)	1379	prepare_schedule (pTHX_ struct transfer_args *ta)
1023	{	1380	{
1024	SV *prev_sv, *next_sv;	1381	SV *prev_sv, *next_sv;
1025		1382
1026	for (;;)	1383	for (;;)
1027	{	1384	{
1028	LOCK;	1385	LOCK;
1029	next_sv = coro_deq (PRIO_MIN);	1386	next_sv = coro_deq (aTHX_ PRIO_MIN);
1030		1387
1031	/* nothing to schedule: call the idle handler */	1388	/* nothing to schedule: call the idle handler */
1032	if (!next_sv)	1389	if (expect_false (!next_sv))
1033	{	1390	{
1034	dSP;	1391	dSP;
1035	UNLOCK;	1392	UNLOCK;
1036		1393
1037	ENTER;	1394	ENTER;
…		…
1047	}	1404	}
1048		1405
1049	ta->next = SvSTATE (next_sv);	1406	ta->next = SvSTATE (next_sv);
1050		1407
1051	/* cannot transfer to destroyed coros, skip and look for next */	1408	/* cannot transfer to destroyed coros, skip and look for next */
1052	if (ta->next->flags & CF_DESTROYED)	1409	if (expect_false (ta->next->flags & CF_DESTROYED))
1053	{	1410	{
1054	UNLOCK;	1411	UNLOCK;
1055	SvREFCNT_dec (next_sv);	1412	SvREFCNT_dec (next_sv);
1056	/* coro_nready is already taken care of by destroy */	1413	/* coro_nready is already taken care of by destroy */
1057	continue;	1414	continue;
…		…
1062	break;	1419	break;
1063	}	1420	}
1064		1421
1065	/* free this only after the transfer */	1422	/* free this only after the transfer */
1066	prev_sv = SvRV (coro_current);	1423	prev_sv = SvRV (coro_current);
1067	SvRV_set (coro_current, next_sv);
1068	ta->prev = SvSTATE (prev_sv);	1424	ta->prev = SvSTATE (prev_sv);
1069		1425	TRANSFER_CHECK (*ta);
1070	assert (ta->next->flags & CF_READY);	1426	assert (ta->next->flags & CF_READY);
1071	ta->next->flags &= ~CF_READY;	1427	ta->next->flags &= ~CF_READY;
		1428	SvRV_set (coro_current, next_sv);
1072		1429
1073	LOCK;	1430	LOCK;
1074	free_coro_mortal ();	1431	free_coro_mortal (aTHX);
1075	coro_mortal = prev_sv;	1432	coro_mortal = prev_sv;
1076	UNLOCK;	1433	UNLOCK;
1077	}	1434	}
1078		1435
1079	static void	1436	static void
1080	prepare_cede (struct transfer_args *ta)	1437	prepare_cede (pTHX_ struct transfer_args *ta)
1081	{	1438	{
1082	api_ready (coro_current);	1439	api_ready (coro_current);
1083	prepare_schedule (ta);	1440	prepare_schedule (aTHX_ ta);
1084	}	1441	}
1085		1442
1086	static int	1443	static int
1087	prepare_cede_notself (struct transfer_args *ta)	1444	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1088	{	1445	{
1089	if (coro_nready)	1446	if (coro_nready)
1090	{	1447	{
1091	SV *prev = SvRV (coro_current);	1448	SV *prev = SvRV (coro_current);
1092	prepare_schedule (ta);	1449	prepare_schedule (aTHX_ ta);
1093	api_ready (prev);	1450	api_ready (prev);
1094	return 1;	1451	return 1;
1095	}	1452	}
1096	else	1453	else
1097	return 0;	1454	return 0;
1098	}	1455	}
1099		1456
1100	static void	1457	static void
1101	api_schedule (void)	1458	api_schedule (void)
1102	{	1459	{
		1460	dTHX;
1103	struct transfer_args ta;	1461	struct transfer_args ta;
1104		1462
1105	prepare_schedule (&ta);	1463	prepare_schedule (aTHX_ &ta);
1106	TRANSFER (ta);	1464	TRANSFER (ta);
1107	}	1465	}
1108		1466
1109	static int	1467	static int
1110	api_cede (void)	1468	api_cede (void)
1111	{	1469	{
		1470	dTHX;
1112	struct transfer_args ta;	1471	struct transfer_args ta;
1113		1472
1114	prepare_cede (&ta);	1473	prepare_cede (aTHX_ &ta);
1115		1474
1116	if (ta.prev != ta.next)	1475	if (expect_true (ta.prev != ta.next))
1117	{	1476	{
1118	TRANSFER (ta);	1477	TRANSFER (ta);
1119	return 1;	1478	return 1;
1120	}	1479	}
1121	else	1480	else
…		…
1123	}	1482	}
1124		1483
1125	static int	1484	static int
1126	api_cede_notself (void)	1485	api_cede_notself (void)
1127	{	1486	{
		1487	dTHX;
1128	struct transfer_args ta;	1488	struct transfer_args ta;
1129		1489
1130	if (prepare_cede_notself (&ta))	1490	if (prepare_cede_notself (aTHX_ &ta))
1131	{	1491	{
1132	TRANSFER (ta);	1492	TRANSFER (ta);
1133	return 1;	1493	return 1;
1134	}	1494	}
1135	else	1495	else
1136	return 0;	1496	return 0;
1137	}	1497	}
1138		1498
		1499	static void
		1500	api_trace (SV *coro_sv, int flags)
		1501	{
		1502	dTHX;
		1503	struct coro *coro = SvSTATE (coro_sv);
		1504
		1505	if (flags & CC_TRACE)
		1506	{
		1507	if (!coro->cctx)
		1508	coro->cctx = cctx_new ();
		1509	else if (!(coro->cctx->flags & CC_TRACE))
		1510	croak ("cannot enable tracing on coroutine with custom stack");
		1511
		1512	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1513	}
		1514	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1515	{
		1516	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1517
		1518	if (coro->flags & CF_RUNNING)
		1519	PL_runops = RUNOPS_DEFAULT;
		1520	else
		1521	coro->slot->runops = RUNOPS_DEFAULT;
		1522	}
		1523	}
		1524
1139	MODULE = Coro::State PACKAGE = Coro::State	1525	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1140		1526
1141	PROTOTYPES: DISABLE	1527	PROTOTYPES: DISABLE
1142		1528
1143	BOOT:	1529	BOOT:
1144	{	1530	{
1145	#ifdef USE_ITHREADS	1531	#ifdef USE_ITHREADS
1146	MUTEX_INIT (&coro_mutex);	1532	MUTEX_INIT (&coro_mutex);
1147	#endif	1533	#endif
1148	BOOT_PAGESIZE;	1534	BOOT_PAGESIZE;
1149		1535
		1536	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1537	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1538	#if 0
		1539	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1540	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1541	#endif
		1542	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1543	rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1544	rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1545
1150	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1546	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1151		1547
		1548	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1549	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1152	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1550	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));	1551	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1157		1552
1158	main_mainstack = PL_mainstack;	1553	main_mainstack = PL_mainstack;
		1554	main_top_env = PL_top_env;
		1555
		1556	while (main_top_env->je_prev)
		1557	main_top_env = main_top_env->je_prev;
1159		1558
1160	coroapi.ver = CORO_API_VERSION;	1559	coroapi.ver = CORO_API_VERSION;
		1560	coroapi.rev = CORO_API_REVISION;
1161	coroapi.transfer = api_transfer;	1561	coroapi.transfer = api_transfer;
1162		1562
1163	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1563	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1164	}	1564	}
1165		1565
1166	SV *	1566	SV *
1167	new (char *klass, ...)	1567	new (char *klass, ...)
1168	CODE:	1568	CODE:
1169	{	1569	{
1170	struct coro *coro;	1570	struct coro *coro;
		1571	MAGIC *mg;
1171	HV *hv;	1572	HV *hv;
1172	int i;	1573	int i;
1173		1574
1174	Newz (0, coro, 1, struct coro);	1575	Newz (0, coro, 1, struct coro);
1175	coro->args = newAV ();	1576	coro->args = newAV ();
1176	coro->save = CORO_SAVE_ALL;
1177	coro->flags = CF_NEW;	1577	coro->flags = CF_NEW;
1178		1578
		1579	if (coro_first) coro_first->prev = coro;
		1580	coro->next = coro_first;
		1581	coro_first = coro;
		1582
1179	hv = newHV ();	1583	coro->hv = hv = newHV ();
1180	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1584	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1585	mg->mg_flags |= MGf_DUP;
1181	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1586	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1182		1587
		1588	av_extend (coro->args, items - 1);
1183	for (i = 1; i < items; i++)	1589	for (i = 1; i < items; i++)
1184	av_push (coro->args, newSVsv (ST (i)));	1590	av_push (coro->args, newSVsv (ST (i)));
1185	}	1591	}
1186	OUTPUT:	1592	OUTPUT:
1187	RETVAL	1593	RETVAL
1188		1594
1189	int	1595	# these not obviously related functions are all rolled into the same xs
1190	save (SV *coro, int new_save = -1)	1596	# function to increase chances that they all will call transfer with the same
1191	CODE:	1597	# stack offset
1192	RETVAL = api_save (coro, new_save);
1193	OUTPUT:
1194	RETVAL
1195
1196	void	1598	void
1197	_set_stacklevel (...)	1599	_set_stacklevel (...)
1198	ALIAS:	1600	ALIAS:
1199	Coro::State::transfer = 1	1601	Coro::State::transfer = 1
1200	Coro::schedule = 2	1602	Coro::schedule = 2
…		…
1213		1615
1214	case 1:	1616	case 1:
1215	if (items != 2)	1617	if (items != 2)
1216	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1618	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1217		1619
1218	prepare_transfer (&ta, ST (0), ST (1));	1620	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1219	break;	1621	break;
1220		1622
1221	case 2:	1623	case 2:
1222	prepare_schedule (&ta);	1624	prepare_schedule (aTHX_ &ta);
1223	break;	1625	break;
1224		1626
1225	case 3:	1627	case 3:
1226	prepare_cede (&ta);	1628	prepare_cede (aTHX_ &ta);
1227	break;	1629	break;
1228		1630
1229	case 4:	1631	case 4:
1230	if (!prepare_cede_notself (&ta))	1632	if (!prepare_cede_notself (aTHX_ &ta))
1231	XSRETURN_EMPTY;	1633	XSRETURN_EMPTY;
1232		1634
1233	break;	1635	break;
1234	}	1636	}
1235		1637
1236	BARRIER;	1638	BARRIER;
		1639	PUTBACK;
1237	TRANSFER (ta);	1640	TRANSFER (ta);
1238		1641	SPAGAIN; /* might be the sp of a different coroutine now */
1239	if (GIMME_V != G_VOID && ta.next != ta.prev)	1642	/* be extra careful not to ever do anything after TRANSFER */
1240	XSRETURN_YES;
1241	}	1643	}
1242		1644
1243	bool	1645	bool
1244	_destroy (SV *coro_sv)	1646	_destroy (SV *coro_sv)
1245	CODE:	1647	CODE:
1246	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1648	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1247	OUTPUT:	1649	OUTPUT:
1248	RETVAL	1650	RETVAL
1249		1651
1250	void	1652	void
1251	_exit (code)	1653	_exit (code)
…		…
1275	CODE:	1677	CODE:
1276	RETVAL = cctx_idle;	1678	RETVAL = cctx_idle;
1277	OUTPUT:	1679	OUTPUT:
1278	RETVAL	1680	RETVAL
1279		1681
		1682	void
		1683	list ()
		1684	PPCODE:
		1685	{
		1686	struct coro *coro;
		1687	for (coro = coro_first; coro; coro = coro->next)
		1688	if (coro->hv)
		1689	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1690	}
		1691
		1692	void
		1693	call (Coro::State coro, SV *coderef)
		1694	ALIAS:
		1695	eval = 1
		1696	CODE:
		1697	{
		1698	if (coro->mainstack)
		1699	{
		1700	struct coro temp;
		1701
		1702	if (!(coro->flags & CF_RUNNING))
		1703	{
		1704	save_perl (aTHX_ &temp);
		1705	load_perl (aTHX_ coro);
		1706	}
		1707
		1708	{
		1709	dSP;
		1710	ENTER;
		1711	SAVETMPS;
		1712	PUTBACK;
		1713	PUSHSTACK;
		1714	PUSHMARK (SP);
		1715
		1716	if (ix)
		1717	eval_sv (coderef, 0);
		1718	else
		1719	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1720
		1721	POPSTACK;
		1722	SPAGAIN;
		1723	FREETMPS;
		1724	LEAVE;
		1725	PUTBACK;
		1726	}
		1727
		1728	if (!(coro->flags & CF_RUNNING))
		1729	{
		1730	save_perl (aTHX_ coro);
		1731	load_perl (aTHX_ &temp);
		1732	}
		1733	}
		1734	}
		1735
		1736	SV *
		1737	is_ready (Coro::State coro)
		1738	PROTOTYPE: $
		1739	ALIAS:
		1740	is_ready = CF_READY
		1741	is_running = CF_RUNNING
		1742	is_new = CF_NEW
		1743	is_destroyed = CF_DESTROYED
		1744	CODE:
		1745	RETVAL = boolSV (coro->flags & ix);
		1746	OUTPUT:
		1747	RETVAL
		1748
		1749	void
		1750	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1751
		1752	SV *
		1753	has_stack (Coro::State coro)
		1754	PROTOTYPE: $
		1755	CODE:
		1756	RETVAL = boolSV (!!coro->cctx);
		1757	OUTPUT:
		1758	RETVAL
		1759
		1760	int
		1761	is_traced (Coro::State coro)
		1762	PROTOTYPE: $
		1763	CODE:
		1764	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1765	OUTPUT:
		1766	RETVAL
		1767
		1768	IV
		1769	rss (Coro::State coro)
		1770	PROTOTYPE: $
		1771	ALIAS:
		1772	usecount = 1
		1773	CODE:
		1774	switch (ix)
		1775	{
		1776	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1777	case 1: RETVAL = coro->usecount; break;
		1778	}
		1779	OUTPUT:
		1780	RETVAL
		1781
		1782
1280	MODULE = Coro::State PACKAGE = Coro	1783	MODULE = Coro::State PACKAGE = Coro
1281		1784
1282	BOOT:	1785	BOOT:
1283	{	1786	{
1284	int i;	1787	int i;
1285		1788
		1789	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1790	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1791	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1792
		1793	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1794	SvREADONLY_on (coro_current);
		1795
1286	coro_stash = gv_stashpv ("Coro", TRUE);	1796	coro_stash = gv_stashpv ("Coro", TRUE);
1287		1797
1288	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1798	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1289	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1799	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1290	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1800	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1291	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1801	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1292	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1802	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1293	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1803	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1294		1804
1295	coro_current = get_sv ("Coro::current", FALSE);
1296	SvREADONLY_on (coro_current);
1297
1298	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1805	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1299	coro_ready[i] = newAV ();	1806	coro_ready[i] = newAV ();
1300		1807
1301	{	1808	{
1302	SV *sv = perl_get_sv("Coro::API", 1);	1809	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1810	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1303		1811
1304	coroapi.schedule = api_schedule;	1812	coroapi.schedule = api_schedule;
1305	coroapi.save = api_save;
1306	coroapi.cede = api_cede;	1813	coroapi.cede = api_cede;
1307	coroapi.cede_notself = api_cede_notself;	1814	coroapi.cede_notself = api_cede_notself;
1308	coroapi.ready = api_ready;	1815	coroapi.ready = api_ready;
1309	coroapi.is_ready = api_is_ready;	1816	coroapi.is_ready = api_is_ready;
1310	coroapi.nready = &coro_nready;	1817	coroapi.nready = &coro_nready;
…		…
1351	CODE:	1858	CODE:
1352	RETVAL = boolSV (api_ready (self));	1859	RETVAL = boolSV (api_ready (self));
1353	OUTPUT:	1860	OUTPUT:
1354	RETVAL	1861	RETVAL
1355		1862
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	1863	int
1365	nready (...)	1864	nready (...)
1366	PROTOTYPE:	1865	PROTOTYPE:
1367	CODE:	1866	CODE:
1368	RETVAL = coro_nready;	1867	RETVAL = coro_nready;
1369	OUTPUT:	1868	OUTPUT:
1370	RETVAL	1869	RETVAL
1371		1870
		1871	void
		1872	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1873	PROTOTYPE: $;$
		1874	CODE:
		1875	SvREFCNT_dec (self->throw);
		1876	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1877
		1878	# for async_pool speedup
		1879	void
		1880	_pool_1 (SV *cb)
		1881	CODE:
		1882	{
		1883	struct coro *coro = SvSTATE (coro_current);
		1884	HV *hv = (HV *)SvRV (coro_current);
		1885	AV *defav = GvAV (PL_defgv);
		1886	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1887	AV *invoke_av;
		1888	int i, len;
		1889
		1890	if (!invoke)
		1891	croak ("\3async_pool terminate\2\n");
		1892
		1893	SvREFCNT_dec (coro->saved_deffh);
		1894	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1895
		1896	hv_store (hv, "desc", sizeof ("desc") - 1,
		1897	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1898
		1899	invoke_av = (AV *)SvRV (invoke);
		1900	len = av_len (invoke_av);
		1901
		1902	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1903
		1904	if (len > 0)
		1905	{
		1906	av_fill (defav, len - 1);
		1907	for (i = 0; i < len; ++i)
		1908	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1909	}
		1910
		1911	SvREFCNT_dec (invoke);
		1912	}
		1913
		1914	void
		1915	_pool_2 (SV *cb)
		1916	CODE:
		1917	{
		1918	struct coro *coro = SvSTATE (coro_current);
		1919
		1920	sv_setsv (cb, &PL_sv_undef);
		1921
		1922	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1923	coro->saved_deffh = 0;
		1924
		1925	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1926	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1927	croak ("\3async_pool terminate\2\n");
		1928
		1929	av_clear (GvAV (PL_defgv));
		1930	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1931	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1932
		1933	coro->prio = 0;
		1934
		1935	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1936	api_trace (coro_current, 0);
		1937
		1938	av_push (av_async_pool, newSVsv (coro_current));
		1939	}
		1940
		1941
1372	MODULE = Coro::State PACKAGE = Coro::AIO	1942	MODULE = Coro::State PACKAGE = Coro::AIO
1373		1943
1374	SV *	1944	SV *
1375	_get_state ()	1945	_get_state ()
1376	CODE:	1946	CODE:

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