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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.142 by root, Tue Feb 13 19:21:29 2007 UTC vs.
Revision 1.201 by root, Mon Oct 8 01:23:14 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
…		…
31	#else	34	#else
32	# define PAGESIZE 0	35	# define PAGESIZE 0
33	# define BOOT_PAGESIZE (void)0	36	# define BOOT_PAGESIZE (void)0
34	#endif	37	#endif
35		38
36	#if USE_VALGRIND	39	#if CORO_USE_VALGRIND
37	# include <valgrind/valgrind.h>	40	# include <valgrind/valgrind.h>
38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))	41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
39	#else	42	#else
40	# define REGISTER_STACK(cctx,start,end)	43	# define REGISTER_STACK(cctx,start,end)
41	#endif	44	#endif
…		…
73	/* 5.8.7 */	76	/* 5.8.7 */
74	#ifndef SvRV_set	77	#ifndef SvRV_set
75	# define SvRV_set(s,v) SvRV(s) = (v)	78	# define SvRV_set(s,v) SvRV(s) = (v)
76	#endif	79	#endif
77		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
		88
78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
79	# undef STACKGUARD	90	# undef CORO_STACKGUARD
80	#endif	91	#endif
81		92
82	#ifndef STACKGUARD	93	#ifndef CORO_STACKGUARD
83	# define STACKGUARD 0	94	# define CORO_STACKGUARD 0
84	#endif	95	#endif
85		96
86	/* prefer perl internal functions over our own? */	97	/* prefer perl internal functions over our own? */
87	#ifndef PREFER_PERL_FUNCTIONS	98	#ifndef CORO_PREFER_PERL_FUNCTIONS
88	# define PREFER_PERL_FUNCTIONS 0	99	# define CORO_PREFER_PERL_FUNCTIONS 0
89	#endif	100	#endif
90		101
91	/* The next macro should declare a variable stacklevel that contains and approximation	102	/* The next macros try to return the current stack pointer, in an as
92	* to the current C stack pointer. Its property is that it changes with each call	103	* portable way as possible. */
93	* and should be unique. */
94	#define dSTACKLEVEL int stacklevel	104	#define dSTACKLEVEL volatile char stacklevel
95	#define STACKLEVEL ((void *)&stacklevel)	105	#define STACKLEVEL ((void *)&stacklevel)
96		106
97	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
98		108
99	#if __GNUC__ >= 3	109	#if __GNUC__ >= 3
100	# define attribute(x) __attribute__(x)	110	# define attribute(x) __attribute__(x)
101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
102	#else	113	#else
103	# define attribute(x)	114	# define attribute(x)
104	# define BARRIER	115	# define BARRIER
		116	# define expect(expr,value) (expr)
105	#endif	117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
106		121
107	#define NOINLINE attribute ((noinline))	122	#define NOINLINE attribute ((noinline))
108		123
109	#include "CoroAPI.h"	124	#include "CoroAPI.h"
110		125
…		…
115	#else	130	#else
116	# define LOCK (void)0	131	# define LOCK (void)0
117	# define UNLOCK (void)0	132	# define UNLOCK (void)0
118	#endif	133	#endif
119		134
		135	#define strpair(const) const, sizeof (const) - 1
		136
120	/* helper storage struct for Coro::AIO */	137	/* helper storage struct for Coro::AIO */
121	struct io_state	138	struct io_state
122	{	139	{
123	int errorno;	140	int errorno;
124	I32 laststype;	141	I32 laststype;
125	int laststatval;	142	int laststatval;
126	Stat_t statcache;	143	Stat_t statcache;
127	};	144	};
128		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
129	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
130	static AV *main_mainstack; /* used to differentiate between $main and others */	148	static AV *main_mainstack; /* used to differentiate between $main and others */
		149	static JMPENV *main_top_env;
131	static HV *coro_state_stash, *coro_stash;	150	static HV *coro_state_stash, *coro_stash;
132	static SV *coro_mortal; /* will be freed after next transfer */	151	static SV *coro_mortal; /* will be freed after next transfer */
133		152
		153	static GV *irsgv; /* $/ */
		154	static GV *stdoutgv; /* *STDOUT */
		155
		156	static HV *hv_sig; /* %SIG */
		157	static SV *sv_diehook;
		158	static SV *sv_warnhook;
		159
		160	/* async_pool helper stuff */
		161	static SV *sv_pool_rss;
		162	static SV *sv_pool_size;
		163	static AV *av_async_pool;
		164
134	static struct coro_cctx *cctx_first;	165	static struct coro_cctx *cctx_first;
135	static int cctx_count, cctx_idle;	166	static int cctx_count, cctx_idle;
		167
		168	enum {
		169	CC_MAPPED = 0x01,
		170	CC_NOREUSE = 0x02, /* throw this away after tracing */
		171	CC_TRACE = 0x04,
		172	CC_TRACE_SUB = 0x08, /* trace sub calls */
		173	CC_TRACE_LINE = 0x10, /* trace each statement */
		174	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		175	};
136		176
137	/* this is a structure representing a c-level coroutine */	177	/* this is a structure representing a c-level coroutine */
138	typedef struct coro_cctx {	178	typedef struct coro_cctx {
139	struct coro_cctx *next;	179	struct coro_cctx *next;
140		180
141	/* the stack */	181	/* the stack */
142	void *sptr;	182	void *sptr;
143	ssize_t ssize; /* positive == mmap, otherwise malloc */	183	size_t ssize;
144		184
145	/* cpu state */	185	/* cpu state */
146	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	186	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
147	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */	187	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
148	JMPENV *top_env;	188	JMPENV *top_env;
149	coro_context cctx;	189	coro_context cctx;
150		190
151	int inuse;
152
153	#if USE_VALGRIND	191	#if CORO_USE_VALGRIND
154	int valgrind_id;	192	int valgrind_id;
155	#endif	193	#endif
		194	unsigned char flags;
156	} coro_cctx;	195	} coro_cctx;
157		196
158	enum {	197	enum {
159	CF_RUNNING = 0x0001, /* coroutine is running */	198	CF_RUNNING = 0x0001, /* coroutine is running */
160	CF_READY = 0x0002, /* coroutine is ready */	199	CF_READY = 0x0002, /* coroutine is ready */
161	CF_NEW = 0x0004, /* has never been switched to */	200	CF_NEW = 0x0004, /* has never been switched to */
162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
163	};	202	};
164		203
		204	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		205	typedef struct {
		206	SV *defsv;
		207	AV *defav;
		208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
		214
		215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		216
165	/* this is a structure representing a perl-level coroutine */	217	/* this is a structure representing a perl-level coroutine */
166	struct coro {	218	struct coro {
167	/* the c coroutine allocated to this perl coroutine, if any */	219	/* the c coroutine allocated to this perl coroutine, if any */
168	coro_cctx *cctx;	220	coro_cctx *cctx;
169		221
		222	/* process data */
		223	AV *mainstack;
		224	perl_slots *slot; /* basically the saved sp */
		225
170	/* data associated with this coroutine (initial args) */	226	/* data associated with this coroutine (initial args) */
171	AV *args;	227	AV *args;
172	int refcnt;	228	int refcnt;
173	int save; /* CORO_SAVE flags */
174	int flags; /* CF_ flags */	229	int flags; /* CF_ flags */
175		230
176	/* optionally saved, might be zero */	231	/* statistics */
177	AV *defav; /* @_ */	232	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		233
187	/* coro process data */	234	/* coro process data */
188	int prio;	235	int prio;
		236	SV *throw;
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro *next, *prev;
		243	HV *hv; /* the perl hash associated with this coro, if any */
189	};	244	};
190		245
191	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
192	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
193		248
…		…
202		257
203	/* for Coro.pm */	258	/* for Coro.pm */
204	static SV *coro_current;	259	static SV *coro_current;
205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	260	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
206	static int coro_nready;	261	static int coro_nready;
		262	static struct coro *coro_first;
207		263
208	/** lowlevel stuff **********************************************************/	264	/** lowlevel stuff **********************************************************/
209		265
		266	static SV *
		267	coro_get_sv (const char *name, int create)
		268	{
		269	#if PERL_VERSION_ATLEAST (5,9,0)
		270	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		271	get_sv (name, create);
		272	#endif
		273	return get_sv (name, create);
		274	}
		275
210	static AV *	276	static AV *
		277	coro_get_av (const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,9,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_av (name, create);
		282	#endif
		283	return get_av (name, create);
		284	}
		285
		286	static HV *
		287	coro_get_hv (const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,9,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_hv (name, create);
		292	#endif
		293	return get_hv (name, create);
		294	}
		295
		296	static AV *
211	coro_clone_padlist (CV *cv)	297	coro_clone_padlist (pTHX_ CV *cv)
212	{	298	{
213	AV *padlist = CvPADLIST (cv);	299	AV *padlist = CvPADLIST (cv);
214	AV *newpadlist, *newpad;	300	AV *newpadlist, *newpad;
215		301
216	newpadlist = newAV ();	302	newpadlist = newAV ();
…		…
228		314
229	return newpadlist;	315	return newpadlist;
230	}	316	}
231		317
232	static void	318	static void
233	free_padlist (AV *padlist)	319	free_padlist (pTHX_ AV *padlist)
234	{	320	{
235	/* may be during global destruction */	321	/* may be during global destruction */
236	if (SvREFCNT (padlist))	322	if (SvREFCNT (padlist))
237	{	323	{
238	I32 i = AvFILLp (padlist);	324	I32 i = AvFILLp (padlist);
…		…
259	AV *padlist;	345	AV *padlist;
260	AV *av = (AV *)mg->mg_obj;	346	AV *av = (AV *)mg->mg_obj;
261		347
262	/* casting is fun. */	348	/* casting is fun. */
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	349	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264	free_padlist (padlist);	350	free_padlist (aTHX_ padlist);
265		351
266	SvREFCNT_dec (av);	352	SvREFCNT_dec (av);
267		353
268	return 0;	354	return 0;
269	}	355	}
…		…
277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	363	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
278	? SvMAGIC (cv) \	364	? SvMAGIC (cv) \
279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	365	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
280	: 0	366	: 0
281		367
		368	static struct coro *
		369	SvSTATE_ (pTHX_ SV *coro)
		370	{
		371	HV *stash;
		372	MAGIC *mg;
		373
		374	if (SvROK (coro))
		375	coro = SvRV (coro);
		376
		377	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		378	croak ("Coro::State object required");
		379
		380	stash = SvSTASH (coro);
		381	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		382	{
		383	/* very slow, but rare, check */
		384	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		385	croak ("Coro::State object required");
		386	}
		387
		388	mg = CORO_MAGIC (coro);
		389	return (struct coro *)mg->mg_ptr;
		390	}
		391
		392	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		393
282	/* the next two functions merely cache the padlists */	394	/* the next two functions merely cache the padlists */
283	static void	395	static void
284	get_padlist (CV *cv)	396	get_padlist (pTHX_ CV *cv)
285	{	397	{
286	MAGIC *mg = CORO_MAGIC (cv);	398	MAGIC *mg = CORO_MAGIC (cv);
287	AV *av;	399	AV *av;
288		400
289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291	else	403	else
292	{	404	{
293	#if PREFER_PERL_FUNCTIONS	405	#if CORO_PREFER_PERL_FUNCTIONS
294	/* this is probably cleaner, but also slower? */	406	/* this is probably cleaner, but also slower? */
295	CV *cp = Perl_cv_clone (cv);	407	CV *cp = Perl_cv_clone (cv);
296	CvPADLIST (cv) = CvPADLIST (cp);	408	CvPADLIST (cv) = CvPADLIST (cp);
297	CvPADLIST (cp) = 0;	409	CvPADLIST (cp) = 0;
298	SvREFCNT_dec (cp);	410	SvREFCNT_dec (cp);
299	#else	411	#else
300	CvPADLIST (cv) = coro_clone_padlist (cv);	412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
301	#endif	413	#endif
302	}	414	}
303	}	415	}
304		416
305	static void	417	static void
306	put_padlist (CV *cv)	418	put_padlist (pTHX_ CV *cv)
307	{	419	{
308	MAGIC *mg = CORO_MAGIC (cv);	420	MAGIC *mg = CORO_MAGIC (cv);
309	AV *av;	421	AV *av;
310		422
311	if (!mg)	423	if (expect_false (!mg))
312	{	424	{
313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
315	mg->mg_virtual = &vtbl_coro;	427	mg->mg_virtual = &vtbl_coro;
316	mg->mg_obj = (SV *)newAV ();	428	mg->mg_obj = (SV *)newAV ();
317	}	429	}
318		430
319	av = (AV *)mg->mg_obj;	431	av = (AV *)mg->mg_obj;
320		432
321	if (AvFILLp (av) >= AvMAX (av))	433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
322	av_extend (av, AvMAX (av) + 1);	434	av_extend (av, AvMAX (av) + 1);
323		435
324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
325	}	437	}
326		438
327	/** load & save, init *******************************************************/	439	/** load & save, init *******************************************************/
328		440
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	441	static void
335	load_perl (Coro__State c)	442	load_perl (pTHX_ Coro__State c)
336	{	443	{
		444	perl_slots *slot = c->slot;
		445	c->slot = 0;
		446
		447	PL_mainstack = c->mainstack;
		448
		449	GvSV (PL_defgv) = slot->defsv;
		450	GvAV (PL_defgv) = slot->defav;
		451	GvSV (PL_errgv) = slot->errsv;
		452	GvSV (irsgv) = slot->irsgv;
		453
337	#define VAR(name,type) PL_ ## name = c->name;	454	#define VAR(name,type) PL_ ## name = slot->name;
338	# include "state.h"	455	# include "state.h"
339	#undef VAR	456	#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		457
356	{	458	{
357	dSP;	459	dSP;
		460
358	CV *cv;	461	CV *cv;
359		462
360	/* now do the ugly restore mess */	463	/* now do the ugly restore mess */
361	while ((cv = (CV *)POPs))	464	while (expect_true (cv = (CV *)POPs))
362	{	465	{
363	put_padlist (cv); /* mark this padlist as available */	466	put_padlist (aTHX_ cv); /* mark this padlist as available */
364	CvDEPTH (cv) = PTR2IV (POPs);	467	CvDEPTH (cv) = PTR2IV (POPs);
365	CvPADLIST (cv) = (AV *)POPs;	468	CvPADLIST (cv) = (AV *)POPs;
366	}	469	}
367		470
368	PUTBACK;	471	PUTBACK;
369	}	472	}
370	assert (!PL_comppad || AvARRAY (PL_comppad));//D
371	}	473	}
372		474
373	static void	475	static void
374	save_perl (Coro__State c)	476	save_perl (pTHX_ Coro__State c)
375	{	477	{
376	assert (!PL_comppad || AvARRAY (PL_comppad));//D
377	{	478	{
378	dSP;	479	dSP;
379	I32 cxix = cxstack_ix;	480	I32 cxix = cxstack_ix;
380	PERL_CONTEXT *ccstk = cxstack;	481	PERL_CONTEXT *ccstk = cxstack;
381	PERL_SI *top_si = PL_curstackinfo;	482	PERL_SI *top_si = PL_curstackinfo;
…		…
383	/*	484	/*
384	* the worst thing you can imagine happens first - we have to save	485	* the worst thing you can imagine happens first - we have to save
385	* (and reinitialize) all cv's in the whole callchain :(	486	* (and reinitialize) all cv's in the whole callchain :(
386	*/	487	*/
387		488
388	EXTEND (SP, 3 + 1);
389	PUSHs (Nullsv);	489	XPUSHs (Nullsv);
390	/* this loop was inspired by pp_caller */	490	/* this loop was inspired by pp_caller */
391	for (;;)	491	for (;;)
392	{	492	{
393	while (cxix >= 0)	493	while (expect_true (cxix >= 0))
394	{	494	{
395	PERL_CONTEXT *cx = &ccstk[cxix--];	495	PERL_CONTEXT *cx = &ccstk[cxix--];
396		496
397	if (CxTYPE (cx) == CXt_SUB)	497	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
398	{	498	{
399	CV *cv = cx->blk_sub.cv;	499	CV *cv = cx->blk_sub.cv;
400		500
401	if (CvDEPTH (cv))	501	if (expect_true (CvDEPTH (cv)))
402	{	502	{
403	EXTEND (SP, 3);	503	EXTEND (SP, 3);
404	PUSHs ((SV *)CvPADLIST (cv));	504	PUSHs ((SV *)CvPADLIST (cv));
405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	505	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
406	PUSHs ((SV *)cv);	506	PUSHs ((SV *)cv);
407		507
408	CvDEPTH (cv) = 0;	508	CvDEPTH (cv) = 0;
409	get_padlist (cv);	509	get_padlist (aTHX_ cv);
410	}	510	}
411	}	511	}
412	}	512	}
413		513
414	if (top_si->si_type == PERLSI_MAIN)	514	if (expect_true (top_si->si_type == PERLSI_MAIN))
415	break;	515	break;
416		516
417	top_si = top_si->si_prev;	517	top_si = top_si->si_prev;
418	ccstk = top_si->si_cxstack;	518	ccstk = top_si->si_cxstack;
419	cxix = top_si->si_cxix;	519	cxix = top_si->si_cxix;
420	}	520	}
421		521
422	PUTBACK;	522	PUTBACK;
423	}	523	}
424		524
425	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	525	/* allocate some space on the context stack for our purposes */
426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	526	{
427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	527	/* we manually unroll here, as usually 2 slots is enough */
428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	528	int i;
		529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	for (i = 3; i < SLOT_COUNT; ++i)
		533	CXINC;
429		534
		535	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		536	}
		537
		538	c->mainstack = PL_mainstack;
		539
		540	{
		541	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		542
		543	slot->defav = GvAV (PL_defgv);
		544	slot->defsv = DEFSV;
		545	slot->errsv = ERRSV;
		546	slot->irsgv = GvSV (irsgv);
		547
430	#define VAR(name,type)c->name = PL_ ## name;	548	#define VAR(name,type) slot->name = PL_ ## name;
431	# include "state.h"	549	# include "state.h"
432	#undef VAR	550	#undef VAR
		551	}
433	}	552	}
434		553
435	/*	554	/*
436	* allocate various perl stacks. This is an exact copy	555	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	556	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	557	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	558	* not usually need a lot of stackspace.
440	*/	559	*/
441	#if PREFER_PERL_FUNCTIONS	560	#if CORO_PREFER_PERL_FUNCTIONS
442	# define coro_init_stacks init_stacks	561	# define coro_init_stacks init_stacks
443	#else	562	#else
444	static void	563	static void
445	coro_init_stacks ()	564	coro_init_stacks (pTHX)
446	{	565	{
447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	566	PL_curstackinfo = new_stackinfo(32, 8);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	567	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	568	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	569	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		570
452	PL_stack_base = AvARRAY(PL_curstack);	571	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	572	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	573	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		574
456	New(50,PL_tmps_stack,128,SV*);	575	New(50,PL_tmps_stack,32,SV*);
457	PL_tmps_floor = -1;	576	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	577	PL_tmps_ix = -1;
459	PL_tmps_max = 128;	578	PL_tmps_max = 32;
460		579
461	New(54,PL_markstack,32,I32);	580	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	581	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 32;	582	PL_markstack_max = PL_markstack + 16;
464		583
465	#ifdef SET_MARK_OFFSET	584	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	585	SET_MARK_OFFSET;
467	#endif	586	#endif
468		587
469	New(54,PL_scopestack,32,I32);	588	New(54,PL_scopestack,8,I32);
470	PL_scopestack_ix = 0;	589	PL_scopestack_ix = 0;
471	PL_scopestack_max = 32;	590	PL_scopestack_max = 8;
472		591
473	New(54,PL_savestack,64,ANY);	592	New(54,PL_savestack,24,ANY);
474	PL_savestack_ix = 0;	593	PL_savestack_ix = 0;
475	PL_savestack_max = 64;	594	PL_savestack_max = 24;
476		595
477	#if !PERL_VERSION_ATLEAST (5,9,0)	596	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,16,OP*);	597	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	598	PL_retstack_ix = 0;
480	PL_retstack_max = 16;	599	PL_retstack_max = 4;
481	#endif	600	#endif
482	}	601	}
483	#endif	602	#endif
484		603
485	/*	604	/*
486	* destroy the stacks, the callchain etc...	605	* destroy the stacks, the callchain etc...
487	*/	606	*/
488	static void	607	static void
489	coro_destroy_stacks ()	608	coro_destroy_stacks (pTHX)
490	{	609	{
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)	610	while (PL_curstackinfo->si_next)
509	PL_curstackinfo = PL_curstackinfo->si_next;	611	PL_curstackinfo = PL_curstackinfo->si_next;
510		612
511	while (PL_curstackinfo)	613	while (PL_curstackinfo)
512	{	614	{
…		…
527	#if !PERL_VERSION_ATLEAST (5,9,0)	629	#if !PERL_VERSION_ATLEAST (5,9,0)
528	Safefree (PL_retstack);	630	Safefree (PL_retstack);
529	#endif	631	#endif
530	}	632	}
531		633
		634	static size_t
		635	coro_rss (pTHX_ struct coro *coro)
		636	{
		637	size_t rss = sizeof (*coro);
		638
		639	if (coro->mainstack)
		640	{
		641	perl_slots tmp_slot;
		642	perl_slots *slot;
		643
		644	if (coro->flags & CF_RUNNING)
		645	{
		646	slot = &tmp_slot;
		647
		648	#define VAR(name,type) slot->name = PL_ ## name;
		649	# include "state.h"
		650	#undef VAR
		651	}
		652	else
		653	slot = coro->slot;
		654
		655	rss += sizeof (slot->curstackinfo);
		656	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		657	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		658	rss += slot->tmps_max * sizeof (SV *);
		659	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		660	rss += slot->scopestack_max * sizeof (I32);
		661	rss += slot->savestack_max * sizeof (ANY);
		662
		663	#if !PERL_VERSION_ATLEAST (5,9,0)
		664	rss += slot->retstack_max * sizeof (OP *);
		665	#endif
		666	}
		667
		668	return rss;
		669	}
		670
532	/** coroutine stack handling ************************************************/	671	/** coroutine stack handling ************************************************/
533		672
534	static void	673	static void
535	setup_coro (struct coro *coro)	674	coro_setup (pTHX_ struct coro *coro)
536	{	675	{
537	/*	676	/*
538	* emulate part of the perl startup here.	677	* emulate part of the perl startup here.
539	*/	678	*/
540
541	coro_init_stacks ();	679	coro_init_stacks (aTHX);
542		680
		681	PL_runops = RUNOPS_DEFAULT;
543	PL_curcop = &PL_compiling;	682	PL_curcop = &PL_compiling;
544	PL_in_eval = EVAL_NULL;	683	PL_in_eval = EVAL_NULL;
545	PL_comppad = 0;	684	PL_comppad = 0;
546	PL_curpm = 0;	685	PL_curpm = 0;
		686	PL_curpad = 0;
547	PL_localizing = 0;	687	PL_localizing = 0;
548	PL_dirty = 0;	688	PL_dirty = 0;
549	PL_restartop = 0;	689	PL_restartop = 0;
		690	SvREFCNT_inc (PL_diehook ); hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		691	SvREFCNT_inc (PL_warnhook); hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		692
		693	GvSV (PL_defgv) = newSV (0);
		694	GvAV (PL_defgv) = coro->args; coro->args = 0;
		695	GvSV (PL_errgv) = newSV (0);
		696	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		697	PL_rs = newSVsv (GvSV (irsgv));
		698	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
550		699
551	{	700	{
552	dSP;	701	dSP;
553	LOGOP myop;	702	LOGOP myop;
554		703
555	SvREFCNT_dec (GvAV (PL_defgv));
556	GvAV (PL_defgv) = coro->args; coro->args = 0;
557
558	Zero (&myop, 1, LOGOP);	704	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	705	myop.op_next = Nullop;
560	myop.op_flags = OPf_WANT_VOID;	706	myop.op_flags = OPf_WANT_VOID;
561		707
562	PUSHMARK (SP);	708	PUSHMARK (SP);
563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	709	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
564	PUTBACK;	710	PUTBACK;
565	PL_op = (OP *)&myop;	711	PL_op = (OP *)&myop;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	712	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	713	SPAGAIN;
568	}	714	}
569		715
570	ENTER; /* necessary e.g. for dounwind */	716	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
571	}	717	}
572		718
573	static void	719	static void
		720	coro_destroy (pTHX_ struct coro *coro)
		721	{
		722	if (!IN_DESTRUCT)
		723	{
		724	/* restore all saved variables and stuff */
		725	LEAVE_SCOPE (0);
		726	assert (PL_tmps_floor == -1);
		727
		728	/* free all temporaries */
		729	FREETMPS;
		730	assert (PL_tmps_ix == -1);
		731
		732	/* unwind all extra stacks */
		733	POPSTACK_TO (PL_mainstack);
		734
		735	/* unwind main stack */
		736	dounwind (-1);
		737	}
		738
		739	SvREFCNT_dec (GvSV (PL_defgv));
		740	SvREFCNT_dec (GvAV (PL_defgv));
		741	SvREFCNT_dec (GvSV (PL_errgv));
		742	SvREFCNT_dec (PL_defoutgv);
		743	SvREFCNT_dec (PL_rs);
		744	SvREFCNT_dec (GvSV (irsgv));
		745
		746	SvREFCNT_dec (PL_diehook);
		747	SvREFCNT_dec (PL_warnhook);
		748
		749	SvREFCNT_dec (coro->saved_deffh);
		750	SvREFCNT_dec (coro->throw);
		751
		752	coro_destroy_stacks (aTHX);
		753	}
		754
		755	static void
574	free_coro_mortal ()	756	free_coro_mortal (pTHX)
575	{	757	{
576	if (coro_mortal)	758	if (expect_true (coro_mortal))
577	{	759	{
578	SvREFCNT_dec (coro_mortal);	760	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;	761	coro_mortal = 0;
580	}	762	}
581	}	763	}
582		764
		765	static int
		766	runops_trace (pTHX)
		767	{
		768	COP *oldcop = 0;
		769	int oldcxix = -2;
		770	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		771	coro_cctx *cctx = coro->cctx;
		772
		773	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		774	{
		775	PERL_ASYNC_CHECK ();
		776
		777	if (cctx->flags & CC_TRACE_ALL)
		778	{
		779	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		780	{
		781	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		782	SV **bot, **top;
		783	AV *av = newAV (); /* return values */
		784	SV **cb;
		785	dSP;
		786
		787	GV *gv = CvGV (cx->blk_sub.cv);
		788	SV *fullname = sv_2mortal (newSV (0));
		789	if (isGV (gv))
		790	gv_efullname3 (fullname, gv, 0);
		791
		792	bot = PL_stack_base + cx->blk_oldsp + 1;
		793	top = cx->blk_gimme == G_ARRAY ? SP + 1
		794	: cx->blk_gimme == G_SCALAR ? bot + 1
		795	: bot;
		796
		797	av_extend (av, top - bot);
		798	while (bot < top)
		799	av_push (av, SvREFCNT_inc (*bot++));
		800
		801	PL_runops = RUNOPS_DEFAULT;
		802	ENTER;
		803	SAVETMPS;
		804	EXTEND (SP, 3);
		805	PUSHMARK (SP);
		806	PUSHs (&PL_sv_no);
		807	PUSHs (fullname);
		808	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		809	PUTBACK;
		810	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		811	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		812	SPAGAIN;
		813	FREETMPS;
		814	LEAVE;
		815	PL_runops = runops_trace;
		816	}
		817
		818	if (oldcop != PL_curcop)
		819	{
		820	oldcop = PL_curcop;
		821
		822	if (PL_curcop != &PL_compiling)
		823	{
		824	SV **cb;
		825
		826	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		827	{
		828	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		829
		830	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		831	{
		832	runops_proc_t old_runops = PL_runops;
		833	dSP;
		834	GV *gv = CvGV (cx->blk_sub.cv);
		835	SV *fullname = sv_2mortal (newSV (0));
		836
		837	if (isGV (gv))
		838	gv_efullname3 (fullname, gv, 0);
		839
		840	PL_runops = RUNOPS_DEFAULT;
		841	ENTER;
		842	SAVETMPS;
		843	EXTEND (SP, 3);
		844	PUSHMARK (SP);
		845	PUSHs (&PL_sv_yes);
		846	PUSHs (fullname);
		847	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		848	PUTBACK;
		849	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		850	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		851	SPAGAIN;
		852	FREETMPS;
		853	LEAVE;
		854	PL_runops = runops_trace;
		855	}
		856
		857	oldcxix = cxstack_ix;
		858	}
		859
		860	if (cctx->flags & CC_TRACE_LINE)
		861	{
		862	dSP;
		863
		864	PL_runops = RUNOPS_DEFAULT;
		865	ENTER;
		866	SAVETMPS;
		867	EXTEND (SP, 3);
		868	PL_runops = RUNOPS_DEFAULT;
		869	PUSHMARK (SP);
		870	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		871	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		872	PUTBACK;
		873	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		874	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		875	SPAGAIN;
		876	FREETMPS;
		877	LEAVE;
		878	PL_runops = runops_trace;
		879	}
		880	}
		881	}
		882	}
		883	}
		884
		885	TAINT_NOT;
		886	return 0;
		887	}
		888
583	/* inject a fake call to Coro::State::_cctx_init into the execution */	889	/* inject a fake call to Coro::State::_cctx_init into the execution */
		890	/* _cctx_init should be careful, as it could be called at almost any time */
		891	/* during execution of a perl program */
584	static void NOINLINE	892	static void NOINLINE
585	prepare_cctx (coro_cctx *cctx)	893	cctx_prepare (pTHX_ coro_cctx *cctx)
586	{	894	{
587	dSP;	895	dSP;
588	LOGOP myop;	896	LOGOP myop;
		897
		898	PL_top_env = &PL_start_env;
		899
		900	if (cctx->flags & CC_TRACE)
		901	PL_runops = runops_trace;
589		902
590	Zero (&myop, 1, LOGOP);	903	Zero (&myop, 1, LOGOP);
591	myop.op_next = PL_op;	904	myop.op_next = PL_op;
592	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	905	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
593		906
…		…
599	PL_op = (OP *)&myop;	912	PL_op = (OP *)&myop;
600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	913	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
601	SPAGAIN;	914	SPAGAIN;
602	}	915	}
603		916
		917	/*
		918	* this is a _very_ stripped down perl interpreter ;)
		919	*/
604	static void	920	static void
605	coro_run (void *arg)	921	cctx_run (void *arg)
606	{	922	{
		923	dTHX;
		924
607	/* coro_run is the alternative tail of transfer(), so unlock here. */	925	/* cctx_run is the alternative tail of transfer(), so unlock here. */
608	UNLOCK;	926	UNLOCK;
609		927
610	/*	928	/* we now skip the entersub that lead to transfer() */
611	* this is a _very_ stripped down perl interpreter ;)	929	PL_op = PL_op->op_next;
612	*/
613	PL_top_env = &PL_start_env;
614		930
615	/* inject call to cctx_init */	931	/* inject a fake subroutine call to cctx_init */
616	prepare_cctx ((coro_cctx *)arg);	932	cctx_prepare (aTHX_ (coro_cctx *)arg);
617		933
618	/* somebody will hit me for both perl_run and PL_restartop */	934	/* somebody or something will hit me for both perl_run and PL_restartop */
619	PL_restartop = PL_op;	935	PL_restartop = PL_op;
620	perl_run (PL_curinterp);	936	perl_run (PL_curinterp);
621		937
622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	938	/*
623	abort ();	939	* If perl-run returns we assume exit() was being called or the coro
		940	* fell off the end, which seems to be the only valid (non-bug)
		941	* reason for perl_run to return. We try to exit by jumping to the
		942	* bootstrap-time "top" top_env, as we cannot restore the "main"
		943	* coroutine as Coro has no such concept
		944	*/
		945	PL_top_env = main_top_env;
		946	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
624	}	947	}
625		948
626	static coro_cctx *	949	static coro_cctx *
627	cctx_new ()	950	cctx_new ()
628	{	951	{
629	coro_cctx *cctx;	952	coro_cctx *cctx;
		953	void *stack_start;
		954	size_t stack_size;
630		955
631	++cctx_count;	956	++cctx_count;
632		957
633	Newz (0, cctx, 1, coro_cctx);	958	Newz (0, cctx, 1, coro_cctx);
634		959
635	#if HAVE_MMAP	960	#if HAVE_MMAP
636
637	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	961	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
638	/* mmap supposedly does allocate-on-write for us */	962	/* mmap supposedly does allocate-on-write for us */
639	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	963	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
640		964
641	if (cctx->sptr != (void *)-1)	965	if (cctx->sptr != (void *)-1)
642	{	966	{
643	# if STACKGUARD	967	# if CORO_STACKGUARD
644	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	968	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
645	# endif	969	# endif
646	REGISTER_STACK (
647	cctx,
648	STACKGUARD * PAGESIZE + (char *)cctx->sptr,	970	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
649	cctx->ssize + (char *)cctx->sptr	971	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
650	);	972	cctx->flags |= CC_MAPPED;
651
652	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
653	}	973	}
654	else	974	else
655	#endif	975	#endif
656	{	976	{
657	cctx->ssize = -STACKSIZE * (long)sizeof (long);	977	cctx->ssize = coro_stacksize * (long)sizeof (long);
658	New (0, cctx->sptr, STACKSIZE, long);	978	New (0, cctx->sptr, coro_stacksize, long);
659		979
660	if (!cctx->sptr)	980	if (!cctx->sptr)
661	{	981	{
662	perror ("FATAL: unable to allocate stack for coroutine");	982	perror ("FATAL: unable to allocate stack for coroutine");
663	_exit (EXIT_FAILURE);	983	_exit (EXIT_FAILURE);
664	}	984	}
665		985
666	REGISTER_STACK (	986	stack_start = cctx->sptr;
667	cctx,	987	stack_size = cctx->ssize;
668	(char *)cctx->sptr,
669	(char *)cctx->sptr - cctx->ssize
670	);
671
672	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
673	}	988	}
		989
		990	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		991	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
674		992
675	return cctx;	993	return cctx;
676	}	994	}
677		995
678	static void	996	static void
…		…
681	if (!cctx)	999	if (!cctx)
682	return;	1000	return;
683		1001
684	--cctx_count;	1002	--cctx_count;
685		1003
686	#if USE_VALGRIND	1004	#if CORO_USE_VALGRIND
687	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1005	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
688	#endif	1006	#endif
689		1007
690	#if HAVE_MMAP	1008	#if HAVE_MMAP
691	if (cctx->ssize > 0)	1009	if (cctx->flags & CC_MAPPED)
692	munmap (cctx->sptr, cctx->ssize);	1010	munmap (cctx->sptr, cctx->ssize);
693	else	1011	else
694	#endif	1012	#endif
695	Safefree (cctx->sptr);	1013	Safefree (cctx->sptr);
696		1014
697	Safefree (cctx);	1015	Safefree (cctx);
698	}	1016	}
699		1017
		1018	/* wether this cctx should be destructed */
		1019	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1020
700	static coro_cctx *	1021	static coro_cctx *
701	cctx_get ()	1022	cctx_get (pTHX)
702	{	1023	{
703	coro_cctx *cctx;	1024	while (expect_true (cctx_first))
704
705	if (cctx_first)
706	{	1025	{
707	cctx = cctx_first;	1026	coro_cctx *cctx = cctx_first;
708	cctx_first = cctx->next;	1027	cctx_first = cctx->next;
709	--cctx_idle;	1028	--cctx_idle;
710	}	1029
711	else	1030	if (expect_true (!CCTX_EXPIRED (cctx)))
712	{	1031	return cctx;
713	cctx = cctx_new ();	1032
714	PL_op = PL_op->op_next;	1033	cctx_destroy (cctx);
715	}	1034	}
716		1035
717	return cctx;	1036	return cctx_new ();
718	}	1037	}
719		1038
720	static void	1039	static void
721	cctx_put (coro_cctx *cctx)	1040	cctx_put (coro_cctx *cctx)
722	{	1041	{
723	/* free another cctx if overlimit */	1042	/* free another cctx if overlimit */
724	if (cctx_idle >= MAX_IDLE_CCTX)	1043	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
725	{	1044	{
726	coro_cctx *first = cctx_first;	1045	coro_cctx *first = cctx_first;
727	cctx_first = first->next;	1046	cctx_first = first->next;
728	--cctx_idle;	1047	--cctx_idle;
729		1048
730	assert (!first->inuse);
731	cctx_destroy (first);	1049	cctx_destroy (first);
732	}	1050	}
733		1051
734	++cctx_idle;	1052	++cctx_idle;
735	cctx->next = cctx_first;	1053	cctx->next = cctx_first;
736	cctx_first = cctx;	1054	cctx_first = cctx;
737	}	1055	}
738		1056
739	/** coroutine switching *****************************************************/	1057	/** coroutine switching *****************************************************/
740		1058
741	/* never call directly, always through the coro_state_transfer global variable */	1059	static void
		1060	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1061	{
		1062	if (expect_true (prev != next))
		1063	{
		1064	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1065	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1066
		1067	if (expect_false (next->flags & CF_RUNNING))
		1068	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1069
		1070	if (expect_false (next->flags & CF_DESTROYED))
		1071	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1072
		1073	if (
		1074	#if PERL_VERSION_ATLEAST (5,9,0)
		1075	expect_false (PL_parser)
		1076	#else
		1077	expect_false (PL_lex_state != LEX_NOTPARSING)
		1078	#endif
		1079	)
		1080	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1081	}
		1082	}
		1083
		1084	/* always use the TRANSFER macro */
742	static void NOINLINE	1085	static void NOINLINE
743	transfer (struct coro *prev, struct coro *next)	1086	transfer (pTHX_ struct coro *prev, struct coro *next)
744	{	1087	{
745	dSTACKLEVEL;	1088	dSTACKLEVEL;
746		1089
747	/* sometimes transfer is only called to set idle_sp */	1090	/* sometimes transfer is only called to set idle_sp */
748	if (!next)	1091	if (expect_false (!next))
749	{	1092	{
750	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1093	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
751	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1094	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
752	}	1095	}
753	else if (prev != next)	1096	else if (expect_true (prev != next))
754	{	1097	{
755	coro_cctx *prev__cctx;	1098	coro_cctx *prev__cctx;
756		1099
757	if (prev->flags & CF_NEW)	1100	if (expect_false (prev->flags & CF_NEW))
758	{	1101	{
759	/* create a new empty context */	1102	/* create a new empty context */
760	Newz (0, prev->cctx, 1, coro_cctx);	1103	Newz (0, prev->cctx, 1, coro_cctx);
761	prev->cctx->inuse = 1;
762	prev->flags &= ~CF_NEW;	1104	prev->flags &= ~CF_NEW;
763	prev->flags |= CF_RUNNING;	1105	prev->flags |= CF_RUNNING;
764	}	1106	}
765		1107
766	/*TODO: must not croak here */
767	if (!prev->flags & CF_RUNNING)
768	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
769
770	if (next->flags & CF_RUNNING)
771	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
772
773	if (next->flags & CF_DESTROYED)
774	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
775
776	prev->flags &= ~CF_RUNNING;	1108	prev->flags &= ~CF_RUNNING;
777	next->flags |= CF_RUNNING;	1109	next->flags |= CF_RUNNING;
778		1110
779	LOCK;	1111	LOCK;
780		1112
781	if (next->flags & CF_NEW)	1113	if (expect_false (next->flags & CF_NEW))
782	{	1114	{
783	/* need to start coroutine */	1115	/* need to start coroutine */
784	next->flags &= ~CF_NEW;	1116	next->flags &= ~CF_NEW;
785	/* first get rid of the old state */	1117	/* first get rid of the old state */
786	save_perl (prev);	1118	save_perl (aTHX_ prev);
787	/* setup coroutine call */	1119	/* setup coroutine call */
788	setup_coro (next);	1120	coro_setup (aTHX_ next);
789	/* need a new stack */
790	assert (!next->cctx);
791	}	1121	}
792	else	1122	else
793	{	1123	{
794	/* coroutine already started */	1124	/* coroutine already started */
795	save_perl (prev);	1125	save_perl (aTHX_ prev);
796	load_perl (next);	1126	load_perl (aTHX_ next);
797	}	1127	}
798		1128
799	prev__cctx = prev->cctx;	1129	prev__cctx = prev->cctx;
800		1130
801	/* possibly "free" the cctx */	1131	/* possibly "free" the cctx */
802	if (prev__cctx->idle_sp == STACKLEVEL)	1132	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
803	{	1133	{
804	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1134	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
805	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1135	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
806		1136
807	prev->cctx = 0;	1137	prev->cctx = 0;
808		1138
		1139	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1140	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1141	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1142	if (!next->cctx)
		1143	next->cctx = cctx_get (aTHX);
		1144
809	cctx_put (prev__cctx);	1145	cctx_put (prev__cctx);
810	prev__cctx->inuse = 0;
811	}	1146	}
812		1147
		1148	++next->usecount;
		1149
813	if (!next->cctx)	1150	if (expect_true (!next->cctx))
814	{
815	next->cctx = cctx_get ();	1151	next->cctx = cctx_get (aTHX);
816	assert (!next->cctx->inuse);
817	next->cctx->inuse = 1;
818	}
819		1152
820	if (prev__cctx != next->cctx)	1153	if (expect_false (prev__cctx != next->cctx))
821	{	1154	{
822	prev__cctx->top_env = PL_top_env;	1155	prev__cctx->top_env = PL_top_env;
823	PL_top_env = next->cctx->top_env;	1156	PL_top_env = next->cctx->top_env;
824	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1157	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
825	}	1158	}
826		1159
827	free_coro_mortal ();	1160	free_coro_mortal (aTHX);
828	UNLOCK;	1161	UNLOCK;
		1162
		1163	if (expect_false (prev->throw || next->throw))
		1164	{
		1165	struct coro *coro = SvSTATE (coro_current);
		1166
		1167	if (coro->throw)
		1168	{
		1169	SV *exception = coro->throw;
		1170	coro->throw = 0;
		1171	sv_setsv (ERRSV, exception);
		1172	croak (0);
		1173	}
		1174	}
829	}	1175	}
830	}	1176	}
831		1177
832	struct transfer_args	1178	struct transfer_args
833	{	1179	{
834	struct coro *prev, *next;	1180	struct coro *prev, *next;
835	};	1181	};
836		1182
837	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1183	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1184	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
838		1185
839	/** high level stuff ********************************************************/	1186	/** high level stuff ********************************************************/
840		1187
841	static int	1188	static int
842	coro_state_destroy (struct coro *coro)	1189	coro_state_destroy (pTHX_ struct coro *coro)
843	{	1190	{
844	if (coro->flags & CF_DESTROYED)	1191	if (coro->flags & CF_DESTROYED)
845	return 0;	1192	return 0;
846		1193
847	coro->flags |= CF_DESTROYED;	1194	coro->flags |= CF_DESTROYED;
…		…
859		1206
860	if (coro->mainstack && coro->mainstack != main_mainstack)	1207	if (coro->mainstack && coro->mainstack != main_mainstack)
861	{	1208	{
862	struct coro temp;	1209	struct coro temp;
863		1210
864	assert (!(coro->flags & CF_RUNNING));
865
866	Zero (&temp, 1, struct coro);
867	temp.save = CORO_SAVE_ALL;
868
869	if (coro->flags & CF_RUNNING)	1211	if (coro->flags & CF_RUNNING)
870	croak ("FATAL: tried to destroy currently running coroutine");	1212	croak ("FATAL: tried to destroy currently running coroutine");
871		1213
872	save_perl (&temp);	1214	save_perl (aTHX_ &temp);
873	load_perl (coro);	1215	load_perl (aTHX_ coro);
874		1216
875	coro_destroy_stacks ();	1217	coro_destroy (aTHX_ coro);
876		1218
877	load_perl (&temp); /* this will get rid of defsv etc.. */	1219	load_perl (aTHX_ &temp);
878		1220
879	coro->mainstack = 0;	1221	coro->slot = 0;
880	}	1222	}
881		1223
882	cctx_destroy (coro->cctx);	1224	cctx_destroy (coro->cctx);
883	SvREFCNT_dec (coro->args);	1225	SvREFCNT_dec (coro->args);
884		1226
		1227	if (coro->next) coro->next->prev = coro->prev;
		1228	if (coro->prev) coro->prev->next = coro->next;
		1229	if (coro == coro_first) coro_first = coro->next;
		1230
885	return 1;	1231	return 1;
886	}	1232	}
887		1233
888	static int	1234	static int
889	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1235	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
890	{	1236	{
891	struct coro *coro = (struct coro *)mg->mg_ptr;	1237	struct coro *coro = (struct coro *)mg->mg_ptr;
892	mg->mg_ptr = 0;	1238	mg->mg_ptr = 0;
893		1239
		1240	coro->hv = 0;
		1241
894	if (--coro->refcnt < 0)	1242	if (--coro->refcnt < 0)
895	{	1243	{
896	coro_state_destroy (coro);	1244	coro_state_destroy (aTHX_ coro);
897	Safefree (coro);	1245	Safefree (coro);
898	}	1246	}
899		1247
900	return 0;	1248	return 0;
901	}	1249	}
…		…
919	#else	1267	#else
920	# define MGf_DUP 0	1268	# define MGf_DUP 0
921	#endif	1269	#endif
922	};	1270	};
923		1271
924	static struct coro *
925	SvSTATE (SV *coro)
926	{
927	HV *stash;
928	MAGIC *mg;
929
930	if (SvROK (coro))
931	coro = SvRV (coro);
932
933	stash = SvSTASH (coro);
934	if (stash != coro_stash && stash != coro_state_stash)
935	{
936	/* very slow, but rare, check */
937	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
938	croak ("Coro::State object required");
939	}
940
941	mg = SvMAGIC (coro);
942	assert (mg->mg_type == PERL_MAGIC_ext);
943	return (struct coro *)mg->mg_ptr;
944	}
945
946	static void	1272	static void
947	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1273	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
948	{	1274	{
949	ta->prev = SvSTATE (prev_sv);	1275	ta->prev = SvSTATE (prev_sv);
950	ta->next = SvSTATE (next_sv);	1276	ta->next = SvSTATE (next_sv);
		1277	TRANSFER_CHECK (*ta);
951	}	1278	}
952		1279
953	static void	1280	static void
954	api_transfer (SV *prev_sv, SV *next_sv)	1281	api_transfer (SV *prev_sv, SV *next_sv)
955	{	1282	{
		1283	dTHX;
956	struct transfer_args ta;	1284	struct transfer_args ta;
957		1285
958	prepare_transfer (&ta, prev_sv, next_sv);	1286	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
959	TRANSFER (ta);	1287	TRANSFER (ta);
960	}	1288	}
961		1289
962	static int
963	api_save (SV *coro_sv, int new_save)
964	{
965	struct coro *coro = SvSTATE (coro_sv);
966	int old_save = coro->save;
967
968	if (new_save >= 0)
969	coro->save = new_save;
970
971	return old_save;
972	}
973
974	/** Coro ********************************************************************/	1290	/** Coro ********************************************************************/
975		1291
976	static void	1292	static void
977	coro_enq (SV *coro_sv)	1293	coro_enq (pTHX_ SV *coro_sv)
978	{	1294	{
979	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1295	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
980	}	1296	}
981		1297
982	static SV *	1298	static SV *
983	coro_deq (int min_prio)	1299	coro_deq (pTHX_ int min_prio)
984	{	1300	{
985	int prio = PRIO_MAX - PRIO_MIN;	1301	int prio = PRIO_MAX - PRIO_MIN;
986		1302
987	min_prio -= PRIO_MIN;	1303	min_prio -= PRIO_MIN;
988	if (min_prio < 0)	1304	if (min_prio < 0)
…		…
996	}	1312	}
997		1313
998	static int	1314	static int
999	api_ready (SV *coro_sv)	1315	api_ready (SV *coro_sv)
1000	{	1316	{
		1317	dTHX;
1001	struct coro *coro;	1318	struct coro *coro;
1002		1319
1003	if (SvROK (coro_sv))	1320	if (SvROK (coro_sv))
1004	coro_sv = SvRV (coro_sv);	1321	coro_sv = SvRV (coro_sv);
1005		1322
…		…
1009	return 0;	1326	return 0;
1010		1327
1011	coro->flags |= CF_READY;	1328	coro->flags |= CF_READY;
1012		1329
1013	LOCK;	1330	LOCK;
1014	coro_enq (SvREFCNT_inc (coro_sv));	1331	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1015	++coro_nready;	1332	++coro_nready;
1016	UNLOCK;	1333	UNLOCK;
1017		1334
1018	return 1;	1335	return 1;
1019	}	1336	}
1020		1337
1021	static int	1338	static int
1022	api_is_ready (SV *coro_sv)	1339	api_is_ready (SV *coro_sv)
1023	{	1340	{
		1341	dTHX;
1024	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1342	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1025	}	1343	}
1026		1344
1027	static void	1345	static void
1028	prepare_schedule (struct transfer_args *ta)	1346	prepare_schedule (pTHX_ struct transfer_args *ta)
1029	{	1347	{
1030	SV *prev_sv, *next_sv;	1348	SV *prev_sv, *next_sv;
1031		1349
1032	for (;;)	1350	for (;;)
1033	{	1351	{
1034	LOCK;	1352	LOCK;
1035	next_sv = coro_deq (PRIO_MIN);	1353	next_sv = coro_deq (aTHX_ PRIO_MIN);
1036		1354
1037	/* nothing to schedule: call the idle handler */	1355	/* nothing to schedule: call the idle handler */
1038	if (!next_sv)	1356	if (expect_false (!next_sv))
1039	{	1357	{
1040	dSP;	1358	dSP;
1041	UNLOCK;	1359	UNLOCK;
1042		1360
1043	ENTER;	1361	ENTER;
…		…
1053	}	1371	}
1054		1372
1055	ta->next = SvSTATE (next_sv);	1373	ta->next = SvSTATE (next_sv);
1056		1374
1057	/* cannot transfer to destroyed coros, skip and look for next */	1375	/* cannot transfer to destroyed coros, skip and look for next */
1058	if (ta->next->flags & CF_DESTROYED)	1376	if (expect_false (ta->next->flags & CF_DESTROYED))
1059	{	1377	{
1060	UNLOCK;	1378	UNLOCK;
1061	SvREFCNT_dec (next_sv);	1379	SvREFCNT_dec (next_sv);
1062	/* coro_nready is already taken care of by destroy */	1380	/* coro_nready is already taken care of by destroy */
1063	continue;	1381	continue;
…		…
1068	break;	1386	break;
1069	}	1387	}
1070		1388
1071	/* free this only after the transfer */	1389	/* free this only after the transfer */
1072	prev_sv = SvRV (coro_current);	1390	prev_sv = SvRV (coro_current);
1073	SvRV_set (coro_current, next_sv);
1074	ta->prev = SvSTATE (prev_sv);	1391	ta->prev = SvSTATE (prev_sv);
1075		1392	TRANSFER_CHECK (*ta);
1076	assert (ta->next->flags & CF_READY);	1393	assert (ta->next->flags & CF_READY);
1077	ta->next->flags &= ~CF_READY;	1394	ta->next->flags &= ~CF_READY;
		1395	SvRV_set (coro_current, next_sv);
1078		1396
1079	LOCK;	1397	LOCK;
1080	free_coro_mortal ();	1398	free_coro_mortal (aTHX);
1081	coro_mortal = prev_sv;	1399	coro_mortal = prev_sv;
1082	UNLOCK;	1400	UNLOCK;
1083	}	1401	}
1084		1402
1085	static void	1403	static void
1086	prepare_cede (struct transfer_args *ta)	1404	prepare_cede (pTHX_ struct transfer_args *ta)
1087	{	1405	{
1088	api_ready (coro_current);	1406	api_ready (coro_current);
1089	prepare_schedule (ta);	1407	prepare_schedule (aTHX_ ta);
1090	}	1408	}
1091		1409
1092	static int	1410	static int
1093	prepare_cede_notself (struct transfer_args *ta)	1411	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1094	{	1412	{
1095	if (coro_nready)	1413	if (coro_nready)
1096	{	1414	{
1097	SV *prev = SvRV (coro_current);	1415	SV *prev = SvRV (coro_current);
1098	prepare_schedule (ta);	1416	prepare_schedule (aTHX_ ta);
1099	api_ready (prev);	1417	api_ready (prev);
1100	return 1;	1418	return 1;
1101	}	1419	}
1102	else	1420	else
1103	return 0;	1421	return 0;
1104	}	1422	}
1105		1423
1106	static void	1424	static void
1107	api_schedule (void)	1425	api_schedule (void)
1108	{	1426	{
		1427	dTHX;
1109	struct transfer_args ta;	1428	struct transfer_args ta;
1110		1429
1111	prepare_schedule (&ta);	1430	prepare_schedule (aTHX_ &ta);
1112	TRANSFER (ta);	1431	TRANSFER (ta);
1113	}	1432	}
1114		1433
1115	static int	1434	static int
1116	api_cede (void)	1435	api_cede (void)
1117	{	1436	{
		1437	dTHX;
1118	struct transfer_args ta;	1438	struct transfer_args ta;
1119		1439
1120	prepare_cede (&ta);	1440	prepare_cede (aTHX_ &ta);
1121		1441
1122	if (ta.prev != ta.next)	1442	if (expect_true (ta.prev != ta.next))
1123	{	1443	{
1124	TRANSFER (ta);	1444	TRANSFER (ta);
1125	return 1;	1445	return 1;
1126	}	1446	}
1127	else	1447	else
…		…
1129	}	1449	}
1130		1450
1131	static int	1451	static int
1132	api_cede_notself (void)	1452	api_cede_notself (void)
1133	{	1453	{
		1454	dTHX;
1134	struct transfer_args ta;	1455	struct transfer_args ta;
1135		1456
1136	if (prepare_cede_notself (&ta))	1457	if (prepare_cede_notself (aTHX_ &ta))
1137	{	1458	{
1138	TRANSFER (ta);	1459	TRANSFER (ta);
1139	return 1;	1460	return 1;
1140	}	1461	}
1141	else	1462	else
1142	return 0;	1463	return 0;
1143	}	1464	}
1144		1465
		1466	static void
		1467	api_trace (SV *coro_sv, int flags)
		1468	{
		1469	dTHX;
		1470	struct coro *coro = SvSTATE (coro_sv);
		1471
		1472	if (flags & CC_TRACE)
		1473	{
		1474	if (!coro->cctx)
		1475	coro->cctx = cctx_new ();
		1476	else if (!(coro->cctx->flags & CC_TRACE))
		1477	croak ("cannot enable tracing on coroutine with custom stack");
		1478
		1479	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1480	}
		1481	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1482	{
		1483	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1484
		1485	if (coro->flags & CF_RUNNING)
		1486	PL_runops = RUNOPS_DEFAULT;
		1487	else
		1488	coro->slot->runops = RUNOPS_DEFAULT;
		1489	}
		1490	}
		1491
1145	MODULE = Coro::State PACKAGE = Coro::State	1492	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1146		1493
1147	PROTOTYPES: DISABLE	1494	PROTOTYPES: DISABLE
1148		1495
1149	BOOT:	1496	BOOT:
1150	{	1497	{
1151	#ifdef USE_ITHREADS	1498	#ifdef USE_ITHREADS
1152	MUTEX_INIT (&coro_mutex);	1499	MUTEX_INIT (&coro_mutex);
1153	#endif	1500	#endif
1154	BOOT_PAGESIZE;	1501	BOOT_PAGESIZE;
1155		1502
		1503	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1504	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1505
		1506	hv_sig = coro_get_hv ("SIG", TRUE);
		1507	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1508	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1509
		1510	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1511	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1512
1156	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1513	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1157		1514
		1515	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1516	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1158	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1159	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1160	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1161	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1162	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1163		1519
1164	main_mainstack = PL_mainstack;	1520	main_mainstack = PL_mainstack;
		1521	main_top_env = PL_top_env;
		1522
		1523	while (main_top_env->je_prev)
		1524	main_top_env = main_top_env->je_prev;
1165		1525
1166	coroapi.ver = CORO_API_VERSION;	1526	coroapi.ver = CORO_API_VERSION;
1167	coroapi.transfer = api_transfer;	1527	coroapi.transfer = api_transfer;
1168		1528
1169	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1529	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1176	struct coro *coro;	1536	struct coro *coro;
1177	HV *hv;	1537	HV *hv;
1178	int i;	1538	int i;
1179		1539
1180	Newz (0, coro, 1, struct coro);	1540	Newz (0, coro, 1, struct coro);
1181	coro->args = newAV ();	1541	coro->args = newAV ();
1182	coro->save = CORO_SAVE_ALL;
1183	coro->flags = CF_NEW;	1542	coro->flags = CF_NEW;
1184		1543
		1544	if (coro_first) coro_first->prev = coro;
		1545	coro->next = coro_first;
		1546	coro_first = coro;
		1547
1185	hv = newHV ();	1548	coro->hv = hv = newHV ();
1186	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1549	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1187	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1550	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1188		1551
		1552	av_extend (coro->args, items - 1);
1189	for (i = 1; i < items; i++)	1553	for (i = 1; i < items; i++)
1190	av_push (coro->args, newSVsv (ST (i)));	1554	av_push (coro->args, newSVsv (ST (i)));
1191	}	1555	}
1192	OUTPUT:	1556	OUTPUT:
1193	RETVAL	1557	RETVAL
1194		1558
1195	int	1559	# these not obviously related functions are all rolled into the same xs
1196	save (SV *coro, int new_save = -1)	1560	# function to increase chances that they all will call transfer with the same
1197	CODE:	1561	# stack offset
1198	RETVAL = api_save (coro, new_save);
1199	OUTPUT:
1200	RETVAL
1201
1202	void	1562	void
1203	_set_stacklevel (...)	1563	_set_stacklevel (...)
1204	ALIAS:	1564	ALIAS:
1205	Coro::State::transfer = 1	1565	Coro::State::transfer = 1
1206	Coro::schedule = 2	1566	Coro::schedule = 2
…		…
1219		1579
1220	case 1:	1580	case 1:
1221	if (items != 2)	1581	if (items != 2)
1222	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1582	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1223		1583
1224	prepare_transfer (&ta, ST (0), ST (1));	1584	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1225	break;	1585	break;
1226		1586
1227	case 2:	1587	case 2:
1228	prepare_schedule (&ta);	1588	prepare_schedule (aTHX_ &ta);
1229	break;	1589	break;
1230		1590
1231	case 3:	1591	case 3:
1232	prepare_cede (&ta);	1592	prepare_cede (aTHX_ &ta);
1233	break;	1593	break;
1234		1594
1235	case 4:	1595	case 4:
1236	if (!prepare_cede_notself (&ta))	1596	if (!prepare_cede_notself (aTHX_ &ta))
1237	XSRETURN_EMPTY;	1597	XSRETURN_EMPTY;
1238		1598
1239	break;	1599	break;
1240	}	1600	}
1241		1601
1242	BARRIER;	1602	BARRIER;
1243	TRANSFER (ta);	1603	TRANSFER (ta);
1244		1604
1245	if (GIMME_V != G_VOID && ta.next != ta.prev)	1605	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1246	XSRETURN_YES;	1606	XSRETURN_YES;
1247	}	1607	}
1248		1608
1249	bool	1609	bool
1250	_destroy (SV *coro_sv)	1610	_destroy (SV *coro_sv)
1251	CODE:	1611	CODE:
1252	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1612	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1253	OUTPUT:	1613	OUTPUT:
1254	RETVAL	1614	RETVAL
1255		1615
1256	void	1616	void
1257	_exit (code)	1617	_exit (code)
…		…
1259	PROTOTYPE: $	1619	PROTOTYPE: $
1260	CODE:	1620	CODE:
1261	_exit (code);	1621	_exit (code);
1262		1622
1263	int	1623	int
		1624	cctx_stacksize (int new_stacksize = 0)
		1625	CODE:
		1626	RETVAL = coro_stacksize;
		1627	if (new_stacksize)
		1628	coro_stacksize = new_stacksize;
		1629	OUTPUT:
		1630	RETVAL
		1631
		1632	int
1264	cctx_count ()	1633	cctx_count ()
1265	CODE:	1634	CODE:
1266	RETVAL = cctx_count;	1635	RETVAL = cctx_count;
1267	OUTPUT:	1636	OUTPUT:
1268	RETVAL	1637	RETVAL
…		…
1272	CODE:	1641	CODE:
1273	RETVAL = cctx_idle;	1642	RETVAL = cctx_idle;
1274	OUTPUT:	1643	OUTPUT:
1275	RETVAL	1644	RETVAL
1276		1645
		1646	void
		1647	list ()
		1648	PPCODE:
		1649	{
		1650	struct coro *coro;
		1651	for (coro = coro_first; coro; coro = coro->next)
		1652	if (coro->hv)
		1653	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1654	}
		1655
		1656	void
		1657	call (Coro::State coro, SV *coderef)
		1658	ALIAS:
		1659	eval = 1
		1660	CODE:
		1661	{
		1662	if (coro->mainstack)
		1663	{
		1664	struct coro temp;
		1665
		1666	if (!(coro->flags & CF_RUNNING))
		1667	{
		1668	save_perl (aTHX_ &temp);
		1669	load_perl (aTHX_ coro);
		1670	}
		1671
		1672	{
		1673	dSP;
		1674	ENTER;
		1675	SAVETMPS;
		1676	PUSHMARK (SP);
		1677	PUTBACK;
		1678
		1679	if (ix)
		1680	eval_sv (coderef, 0);
		1681	else
		1682	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1683
		1684	SPAGAIN;
		1685	FREETMPS;
		1686	LEAVE;
		1687	PUTBACK;
		1688	}
		1689
		1690	if (!(coro->flags & CF_RUNNING))
		1691	{
		1692	save_perl (aTHX_ coro);
		1693	load_perl (aTHX_ &temp);
		1694	}
		1695	}
		1696	}
		1697
		1698	SV *
		1699	is_ready (Coro::State coro)
		1700	PROTOTYPE: $
		1701	ALIAS:
		1702	is_ready = CF_READY
		1703	is_running = CF_RUNNING
		1704	is_new = CF_NEW
		1705	is_destroyed = CF_DESTROYED
		1706	CODE:
		1707	RETVAL = boolSV (coro->flags & ix);
		1708	OUTPUT:
		1709	RETVAL
		1710
		1711	void
		1712	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1713
		1714	SV *
		1715	has_stack (Coro::State coro)
		1716	PROTOTYPE: $
		1717	CODE:
		1718	RETVAL = boolSV (!!coro->cctx);
		1719	OUTPUT:
		1720	RETVAL
		1721
		1722	int
		1723	is_traced (Coro::State coro)
		1724	PROTOTYPE: $
		1725	CODE:
		1726	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1727	OUTPUT:
		1728	RETVAL
		1729
		1730	IV
		1731	rss (Coro::State coro)
		1732	PROTOTYPE: $
		1733	ALIAS:
		1734	usecount = 1
		1735	CODE:
		1736	switch (ix)
		1737	{
		1738	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1739	case 1: RETVAL = coro->usecount; break;
		1740	}
		1741	OUTPUT:
		1742	RETVAL
		1743
		1744
1277	MODULE = Coro::State PACKAGE = Coro	1745	MODULE = Coro::State PACKAGE = Coro
1278		1746
1279	BOOT:	1747	BOOT:
1280	{	1748	{
1281	int i;	1749	int i;
1282		1750
		1751	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1752	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1753	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1754
		1755	coro_current = coro_get_sv ("Coro::current", FALSE);
		1756	SvREADONLY_on (coro_current);
		1757
1283	coro_stash = gv_stashpv ("Coro", TRUE);	1758	coro_stash = gv_stashpv ("Coro", TRUE);
1284		1759
1285	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1760	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1286	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1761	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1287	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1762	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1288	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1763	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1289	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1764	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1290	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1765	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1291		1766
1292	coro_current = get_sv ("Coro::current", FALSE);
1293	SvREADONLY_on (coro_current);
1294
1295	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1767	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1296	coro_ready[i] = newAV ();	1768	coro_ready[i] = newAV ();
1297		1769
1298	{	1770	{
1299	SV *sv = perl_get_sv("Coro::API", 1);	1771	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1772	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1300		1773
1301	coroapi.schedule = api_schedule;	1774	coroapi.schedule = api_schedule;
1302	coroapi.save = api_save;
1303	coroapi.cede = api_cede;	1775	coroapi.cede = api_cede;
1304	coroapi.cede_notself = api_cede_notself;	1776	coroapi.cede_notself = api_cede_notself;
1305	coroapi.ready = api_ready;	1777	coroapi.ready = api_ready;
1306	coroapi.is_ready = api_is_ready;	1778	coroapi.is_ready = api_is_ready;
1307	coroapi.nready = &coro_nready;	1779	coroapi.nready = &coro_nready;
…		…
1348	CODE:	1820	CODE:
1349	RETVAL = boolSV (api_ready (self));	1821	RETVAL = boolSV (api_ready (self));
1350	OUTPUT:	1822	OUTPUT:
1351	RETVAL	1823	RETVAL
1352		1824
1353	SV *
1354	is_ready (SV *self)
1355	PROTOTYPE: $
1356	CODE:
1357	RETVAL = boolSV (api_is_ready (self));
1358	OUTPUT:
1359	RETVAL
1360
1361	int	1825	int
1362	nready (...)	1826	nready (...)
1363	PROTOTYPE:	1827	PROTOTYPE:
1364	CODE:	1828	CODE:
1365	RETVAL = coro_nready;	1829	RETVAL = coro_nready;
1366	OUTPUT:	1830	OUTPUT:
1367	RETVAL	1831	RETVAL
1368		1832
		1833	void
		1834	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1835	PROTOTYPE: $;$
		1836	CODE:
		1837	SvREFCNT_dec (self->throw);
		1838	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1839
		1840	# for async_pool speedup
		1841	void
		1842	_pool_1 (SV *cb)
		1843	CODE:
		1844	{
		1845	struct coro *coro = SvSTATE (coro_current);
		1846	HV *hv = (HV *)SvRV (coro_current);
		1847	AV *defav = GvAV (PL_defgv);
		1848	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1849	AV *invoke_av;
		1850	int i, len;
		1851
		1852	if (!invoke)
		1853	croak ("\3async_pool terminate\2\n");
		1854
		1855	SvREFCNT_dec (coro->saved_deffh);
		1856	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1857
		1858	hv_store (hv, "desc", sizeof ("desc") - 1,
		1859	newSVpvn (strpair ("[async_pool]")), 0);
		1860
		1861	invoke_av = (AV *)SvRV (invoke);
		1862	len = av_len (invoke_av);
		1863
		1864	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1865
		1866	if (len > 0)
		1867	{
		1868	av_fill (defav, len - 1);
		1869	for (i = 0; i < len; ++i)
		1870	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1871	}
		1872
		1873	SvREFCNT_dec (invoke);
		1874	}
		1875
		1876	void
		1877	_pool_2 (SV *cb)
		1878	CODE:
		1879	{
		1880	struct coro *coro = SvSTATE (coro_current);
		1881
		1882	sv_setsv (cb, &PL_sv_undef);
		1883
		1884	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1885	coro->saved_deffh = 0;
		1886
		1887	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1888	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1889	croak ("\3async_pool terminate\2\n");
		1890
		1891	av_clear (GvAV (PL_defgv));
		1892	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1893	newSVpvn (strpair ("[async_pool idle]")), 0);
		1894
		1895	coro->prio = 0;
		1896
		1897	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1898	api_trace (coro_current, 0);
		1899
		1900	av_push (av_async_pool, newSVsv (coro_current));
		1901	}
		1902
		1903
1369	MODULE = Coro::State PACKAGE = Coro::AIO	1904	MODULE = Coro::State PACKAGE = Coro::AIO
1370		1905
1371	SV *	1906	SV *
1372	_get_state ()	1907	_get_state ()
1373	CODE:	1908	CODE:

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