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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.130 by root, Mon Dec 25 13:25:55 2006 UTC vs.
Revision 1.200 by root, Sun Oct 7 15:08:23 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>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
38	#endif	44	#endif
39		45
40	/* the maximum number of idle cctx that will be pooled */	46	/* the maximum number of idle cctx that will be pooled */
41	#define MAX_IDLE_CCTX 8	47	#define MAX_IDLE_CCTX 8
42		48
…		…
70	/* 5.8.7 */	76	/* 5.8.7 */
71	#ifndef SvRV_set	77	#ifndef SvRV_set
72	# define SvRV_set(s,v) SvRV(s) = (v)	78	# define SvRV_set(s,v) SvRV(s) = (v)
73	#endif	79	#endif
74		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
75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76	# undef STACKGUARD	90	# undef CORO_STACKGUARD
77	#endif	91	#endif
78		92
79	#ifndef STACKGUARD	93	#ifndef CORO_STACKGUARD
80	# define STACKGUARD 0	94	# define CORO_STACKGUARD 0
81	#endif	95	#endif
82		96
83	/* prefer perl internal functions over our own? */	97	/* prefer perl internal functions over our own? */
84	#ifndef PREFER_PERL_FUNCTIONS	98	#ifndef CORO_PREFER_PERL_FUNCTIONS
85	# define PREFER_PERL_FUNCTIONS 0	99	# define CORO_PREFER_PERL_FUNCTIONS 0
86	#endif	100	#endif
87		101
88	/* 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
89	* to the current C stack pointer. Its property is that it changes with each call	103	* portable way as possible. */
90	* and should be unique. */
91	#define dSTACKLEVEL int stacklevel	104	#define dSTACKLEVEL volatile char stacklevel
92	#define STACKLEVEL ((void *)&stacklevel)	105	#define STACKLEVEL ((void *)&stacklevel)
93		106
94	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
95		108
96	#if __GNUC__ >= 3	109	#if __GNUC__ >= 3
97	# define attribute(x) __attribute__(x)	110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
98	#else	113	#else
99	# define attribute(x)	114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
100	#endif	117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
101		121
102	#define NOINLINE attribute ((noinline))	122	#define NOINLINE attribute ((noinline))
103		123
104	#include "CoroAPI.h"	124	#include "CoroAPI.h"
105		125
…		…
110	#else	130	#else
111	# define LOCK (void)0	131	# define LOCK (void)0
112	# define UNLOCK (void)0	132	# define UNLOCK (void)0
113	#endif	133	#endif
114		134
		135	#define strpair(const) const, sizeof (const) - 1
		136
		137	/* helper storage struct for Coro::AIO */
115	struct io_state	138	struct io_state
116	{	139	{
117	int errorno;	140	int errorno;
118	I32 laststype;	141	I32 laststype;
119	int laststatval;	142	int laststatval;
120	Stat_t statcache;	143	Stat_t statcache;
121	};	144	};
122		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
123	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
124	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;
125	static HV *coro_state_stash, *coro_stash;	150	static HV *coro_state_stash, *coro_stash;
126	static SV *coro_mortal; /* will be freed after next transfer */	151	static SV *coro_mortal; /* will be freed after next transfer */
127		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
128	static struct coro_cctx *cctx_first;	165	static struct coro_cctx *cctx_first;
129	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	};
130		176
131	/* this is a structure representing a c-level coroutine */	177	/* this is a structure representing a c-level coroutine */
132	typedef struct coro_cctx {	178	typedef struct coro_cctx {
133	struct coro_cctx *next;	179	struct coro_cctx *next;
134		180
135	/* the stack */	181	/* the stack */
136	void *sptr;	182	void *sptr;
137	long ssize; /* positive == mmap, otherwise malloc */	183	size_t ssize;
138		184
139	/* cpu state */	185	/* cpu state */
140	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	186	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		187	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
141	JMPENV *top_env;	188	JMPENV *top_env;
142	coro_context cctx;	189	coro_context cctx;
143		190
144	int inuse;
145
146	#if USE_VALGRIND	191	#if CORO_USE_VALGRIND
147	int valgrind_id;	192	int valgrind_id;
148	#endif	193	#endif
		194	unsigned char flags;
149	} coro_cctx;	195	} coro_cctx;
150		196
151	enum {	197	enum {
152	CF_RUNNING = 0x0001, /* coroutine is running */	198	CF_RUNNING = 0x0001, /* coroutine is running */
153	CF_READY = 0x0002, /* coroutine is ready */	199	CF_READY = 0x0002, /* coroutine is ready */
154	CF_NEW = 0x0004, /* ahs never been switched to */	200	CF_NEW = 0x0004, /* has never been switched to */
		201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
155	};	202	};
		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))
156		216
157	/* this is a structure representing a perl-level coroutine */	217	/* this is a structure representing a perl-level coroutine */
158	struct coro {	218	struct coro {
159	/* the c coroutine allocated to this perl coroutine, if any */	219	/* the c coroutine allocated to this perl coroutine, if any */
160	coro_cctx *cctx;	220	coro_cctx *cctx;
161		221
		222	/* process data */
		223	AV *mainstack;
		224	perl_slots *slot; /* basically the saved sp */
		225
162	/* data associated with this coroutine (initial args) */	226	/* data associated with this coroutine (initial args) */
163	AV *args;	227	AV *args;
164	int refcnt;	228	int refcnt;
165	int save; /* CORO_SAVE flags */
166	int flags; /* CF_ flags */	229	int flags; /* CF_ flags */
167		230
168	/* optionally saved, might be zero */	231	/* statistics */
169	AV *defav; /* @_ */	232	int usecount; /* number of transfers to this coro */
170	SV *defsv; /* $_ */
171	SV *errsv; /* $@ */
172	SV *irssv; /* $/ */
173	SV *irssv_sv; /* real $/ cache */
174
175	#define VAR(name,type) type name;
176	# include "state.h"
177	#undef VAR
178		233
179	/* coro process data */	234	/* coro process data */
180	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 */
181	};	244	};
182		245
183	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
184	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
185		248
		249	/** Coro ********************************************************************/
		250
		251	#define PRIO_MAX 3
		252	#define PRIO_HIGH 1
		253	#define PRIO_NORMAL 0
		254	#define PRIO_LOW -1
		255	#define PRIO_IDLE -3
		256	#define PRIO_MIN -4
		257
		258	/* for Coro.pm */
		259	static SV *coro_current;
		260	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		261	static int coro_nready;
		262	static struct coro *coro_first;
		263
		264	/** lowlevel stuff **********************************************************/
		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
186	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 *
187	coro_clone_padlist (CV *cv)	297	coro_clone_padlist (pTHX_ CV *cv)
188	{	298	{
189	AV *padlist = CvPADLIST (cv);	299	AV *padlist = CvPADLIST (cv);
190	AV *newpadlist, *newpad;	300	AV *newpadlist, *newpad;
191		301
192	newpadlist = newAV ();	302	newpadlist = newAV ();
…		…
204		314
205	return newpadlist;	315	return newpadlist;
206	}	316	}
207		317
208	static void	318	static void
209	free_padlist (AV *padlist)	319	free_padlist (pTHX_ AV *padlist)
210	{	320	{
211	/* may be during global destruction */	321	/* may be during global destruction */
212	if (SvREFCNT (padlist))	322	if (SvREFCNT (padlist))
213	{	323	{
214	I32 i = AvFILLp (padlist);	324	I32 i = AvFILLp (padlist);
…		…
235	AV *padlist;	345	AV *padlist;
236	AV *av = (AV *)mg->mg_obj;	346	AV *av = (AV *)mg->mg_obj;
237		347
238	/* casting is fun. */	348	/* casting is fun. */
239	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	349	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
240	free_padlist (padlist);	350	free_padlist (aTHX_ padlist);
241		351
242	SvREFCNT_dec (av);	352	SvREFCNT_dec (av);
243		353
244	return 0;	354	return 0;
245	}	355	}
…		…
253	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	363	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
254	? SvMAGIC (cv) \	364	? SvMAGIC (cv) \
255	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	365	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
256	: 0	366	: 0
257		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
258	/* the next two functions merely cache the padlists */	394	/* the next two functions merely cache the padlists */
259	static void	395	static void
260	get_padlist (CV *cv)	396	get_padlist (pTHX_ CV *cv)
261	{	397	{
262	MAGIC *mg = CORO_MAGIC (cv);	398	MAGIC *mg = CORO_MAGIC (cv);
263	AV *av;	399	AV *av;
264		400
265	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
266	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
267	else	403	else
268	{	404	{
269	#if PREFER_PERL_FUNCTIONS	405	#if CORO_PREFER_PERL_FUNCTIONS
270	/* this is probably cleaner, but also slower? */	406	/* this is probably cleaner, but also slower? */
271	CV *cp = Perl_cv_clone (cv);	407	CV *cp = Perl_cv_clone (cv);
272	CvPADLIST (cv) = CvPADLIST (cp);	408	CvPADLIST (cv) = CvPADLIST (cp);
273	CvPADLIST (cp) = 0;	409	CvPADLIST (cp) = 0;
274	SvREFCNT_dec (cp);	410	SvREFCNT_dec (cp);
275	#else	411	#else
276	CvPADLIST (cv) = coro_clone_padlist (cv);	412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
277	#endif	413	#endif
278	}	414	}
279	}	415	}
280		416
281	static void	417	static void
282	put_padlist (CV *cv)	418	put_padlist (pTHX_ CV *cv)
283	{	419	{
284	MAGIC *mg = CORO_MAGIC (cv);	420	MAGIC *mg = CORO_MAGIC (cv);
285	AV *av;	421	AV *av;
286		422
287	if (!mg)	423	if (expect_false (!mg))
288	{	424	{
289	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
290	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
291	mg->mg_virtual = &vtbl_coro;	427	mg->mg_virtual = &vtbl_coro;
292	mg->mg_obj = (SV *)newAV ();	428	mg->mg_obj = (SV *)newAV ();
293	}	429	}
294		430
295	av = (AV *)mg->mg_obj;	431	av = (AV *)mg->mg_obj;
296		432
297	if (AvFILLp (av) >= AvMAX (av))	433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
298	av_extend (av, AvMAX (av) + 1);	434	av_extend (av, AvMAX (av) + 1);
299		435
300	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
301	}	437	}
302		438
303	#define SB do {	439	/** load & save, init *******************************************************/
304	#define SE } while (0)
305		440
306	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
307
308	static void	441	static void
309	load_perl (Coro__State c)	442	load_perl (pTHX_ Coro__State c)
310	{	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
311	#define VAR(name,type) PL_ ## name = c->name;	454	#define VAR(name,type) PL_ ## name = slot->name;
312	# include "state.h"	455	# include "state.h"
313	#undef VAR	456	#undef VAR
314
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318	if (c->irssv)
319	{
320	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
321	SvREFCNT_dec (c->irssv);
322	else
323	{
324	REPLACE_SV (PL_rs, c->irssv);
325	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
326	sv_setsv (c->irssv_sv, PL_rs);
327	}
328	}
329		457
330	{	458	{
331	dSP;	459	dSP;
		460
332	CV *cv;	461	CV *cv;
333		462
334	/* now do the ugly restore mess */	463	/* now do the ugly restore mess */
335	while ((cv = (CV *)POPs))	464	while (expect_true (cv = (CV *)POPs))
336	{	465	{
337	put_padlist (cv); /* mark this padlist as available */	466	put_padlist (aTHX_ cv); /* mark this padlist as available */
338	CvDEPTH (cv) = PTR2IV (POPs);	467	CvDEPTH (cv) = PTR2IV (POPs);
339	CvPADLIST (cv) = (AV *)POPs;	468	CvPADLIST (cv) = (AV *)POPs;
340	}	469	}
341		470
342	PUTBACK;	471	PUTBACK;
343	}	472	}
344	}	473	}
345		474
346	static void	475	static void
347	save_perl (Coro__State c)	476	save_perl (pTHX_ Coro__State c)
348	{	477	{
349	{	478	{
350	dSP;	479	dSP;
351	I32 cxix = cxstack_ix;	480	I32 cxix = cxstack_ix;
352	PERL_CONTEXT *ccstk = cxstack;	481	PERL_CONTEXT *ccstk = cxstack;
…		…
355	/*	484	/*
356	* 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
357	* (and reinitialize) all cv's in the whole callchain :(	486	* (and reinitialize) all cv's in the whole callchain :(
358	*/	487	*/
359		488
360	EXTEND (SP, 3 + 1);
361	PUSHs (Nullsv);	489	XPUSHs (Nullsv);
362	/* this loop was inspired by pp_caller */	490	/* this loop was inspired by pp_caller */
363	for (;;)	491	for (;;)
364	{	492	{
365	while (cxix >= 0)	493	while (expect_true (cxix >= 0))
366	{	494	{
367	PERL_CONTEXT *cx = &ccstk[cxix--];	495	PERL_CONTEXT *cx = &ccstk[cxix--];
368		496
369	if (CxTYPE (cx) == CXt_SUB)	497	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
370	{	498	{
371	CV *cv = cx->blk_sub.cv;	499	CV *cv = cx->blk_sub.cv;
372		500
373	if (CvDEPTH (cv))	501	if (expect_true (CvDEPTH (cv)))
374	{	502	{
375	EXTEND (SP, 3);	503	EXTEND (SP, 3);
376	PUSHs ((SV *)CvPADLIST (cv));	504	PUSHs ((SV *)CvPADLIST (cv));
377	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	505	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
378	PUSHs ((SV *)cv);	506	PUSHs ((SV *)cv);
379		507
380	CvDEPTH (cv) = 0;	508	CvDEPTH (cv) = 0;
381	get_padlist (cv);	509	get_padlist (aTHX_ cv);
382	}	510	}
383	}	511	}
384	}	512	}
385		513
386	if (top_si->si_type == PERLSI_MAIN)	514	if (expect_true (top_si->si_type == PERLSI_MAIN))
387	break;	515	break;
388		516
389	top_si = top_si->si_prev;	517	top_si = top_si->si_prev;
390	ccstk = top_si->si_cxstack;	518	ccstk = top_si->si_cxstack;
391	cxix = top_si->si_cxix;	519	cxix = top_si->si_cxix;
392	}	520	}
393		521
394	PUTBACK;	522	PUTBACK;
395	}	523	}
396		524
397	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 */
398	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	526	{
399	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	527	/* we manually unroll here, as usually 2 slots is enough */
400	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;
401		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
402	#define VAR(name,type)c->name = PL_ ## name;	548	#define VAR(name,type) slot->name = PL_ ## name;
403	# include "state.h"	549	# include "state.h"
404	#undef VAR	550	#undef VAR
		551	}
405	}	552	}
406		553
407	/*	554	/*
408	* allocate various perl stacks. This is an exact copy	555	* allocate various perl stacks. This is an exact copy
409	* of perl.c:init_stacks, except that it uses less memory	556	* of perl.c:init_stacks, except that it uses less memory
410	* on the (sometimes correct) assumption that coroutines do	557	* on the (sometimes correct) assumption that coroutines do
411	* not usually need a lot of stackspace.	558	* not usually need a lot of stackspace.
412	*/	559	*/
413	#if PREFER_PERL_FUNCTIONS	560	#if CORO_PREFER_PERL_FUNCTIONS
414	# define coro_init_stacks init_stacks	561	# define coro_init_stacks init_stacks
415	#else	562	#else
416	static void	563	static void
417	coro_init_stacks ()	564	coro_init_stacks (pTHX)
418	{	565	{
419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	566	PL_curstackinfo = new_stackinfo(32, 8);
420	PL_curstackinfo->si_type = PERLSI_MAIN;	567	PL_curstackinfo->si_type = PERLSI_MAIN;
421	PL_curstack = PL_curstackinfo->si_stack;	568	PL_curstack = PL_curstackinfo->si_stack;
422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	569	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
423		570
424	PL_stack_base = AvARRAY(PL_curstack);	571	PL_stack_base = AvARRAY(PL_curstack);
425	PL_stack_sp = PL_stack_base;	572	PL_stack_sp = PL_stack_base;
426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	573	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
427		574
428	New(50,PL_tmps_stack,128,SV*);	575	New(50,PL_tmps_stack,32,SV*);
429	PL_tmps_floor = -1;	576	PL_tmps_floor = -1;
430	PL_tmps_ix = -1;	577	PL_tmps_ix = -1;
431	PL_tmps_max = 128;	578	PL_tmps_max = 32;
432		579
433	New(54,PL_markstack,32,I32);	580	New(54,PL_markstack,16,I32);
434	PL_markstack_ptr = PL_markstack;	581	PL_markstack_ptr = PL_markstack;
435	PL_markstack_max = PL_markstack + 32;	582	PL_markstack_max = PL_markstack + 16;
436		583
437	#ifdef SET_MARK_OFFSET	584	#ifdef SET_MARK_OFFSET
438	SET_MARK_OFFSET;	585	SET_MARK_OFFSET;
439	#endif	586	#endif
440		587
441	New(54,PL_scopestack,32,I32);	588	New(54,PL_scopestack,8,I32);
442	PL_scopestack_ix = 0;	589	PL_scopestack_ix = 0;
443	PL_scopestack_max = 32;	590	PL_scopestack_max = 8;
444		591
445	New(54,PL_savestack,64,ANY);	592	New(54,PL_savestack,24,ANY);
446	PL_savestack_ix = 0;	593	PL_savestack_ix = 0;
447	PL_savestack_max = 64;	594	PL_savestack_max = 24;
448		595
449	#if !PERL_VERSION_ATLEAST (5,9,0)	596	#if !PERL_VERSION_ATLEAST (5,9,0)
450	New(54,PL_retstack,16,OP*);	597	New(54,PL_retstack,4,OP*);
451	PL_retstack_ix = 0;	598	PL_retstack_ix = 0;
452	PL_retstack_max = 16;	599	PL_retstack_max = 4;
453	#endif	600	#endif
454	}	601	}
455	#endif	602	#endif
456		603
457	/*	604	/*
458	* destroy the stacks, the callchain etc...	605	* destroy the stacks, the callchain etc...
459	*/	606	*/
460	static void	607	static void
461	coro_destroy_stacks ()	608	coro_destroy_stacks (pTHX)
462	{	609	{
463	if (!IN_DESTRUCT)
464	{
465	/* restore all saved variables and stuff */
466	LEAVE_SCOPE (0);
467	assert (PL_tmps_floor == -1);
468
469	/* free all temporaries */
470	FREETMPS;
471	assert (PL_tmps_ix == -1);
472
473	POPSTACK_TO (PL_mainstack);
474	}
475
476	while (PL_curstackinfo->si_next)	610	while (PL_curstackinfo->si_next)
477	PL_curstackinfo = PL_curstackinfo->si_next;	611	PL_curstackinfo = PL_curstackinfo->si_next;
478		612
479	while (PL_curstackinfo)	613	while (PL_curstackinfo)
480	{	614	{
…		…
495	#if !PERL_VERSION_ATLEAST (5,9,0)	629	#if !PERL_VERSION_ATLEAST (5,9,0)
496	Safefree (PL_retstack);	630	Safefree (PL_retstack);
497	#endif	631	#endif
498	}	632	}
499		633
500	static void	634	static size_t
501	setup_coro (struct coro *coro)	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
		671	/** coroutine stack handling ************************************************/
		672
		673	static void
		674	coro_setup (pTHX_ struct coro *coro)
502	{	675	{
503	/*	676	/*
504	* emulate part of the perl startup here.	677	* emulate part of the perl startup here.
505	*/	678	*/
506
507	coro_init_stacks ();	679	coro_init_stacks (aTHX);
508		680
		681	PL_runops = RUNOPS_DEFAULT;
509	PL_curcop = &PL_compiling;	682	PL_curcop = &PL_compiling;
510	PL_in_eval = EVAL_NULL;	683	PL_in_eval = EVAL_NULL;
		684	PL_comppad = 0;
511	PL_curpm = 0;	685	PL_curpm = 0;
		686	PL_curpad = 0;
512	PL_localizing = 0;	687	PL_localizing = 0;
513	PL_dirty = 0;	688	PL_dirty = 0;
514	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);
515		699
516	{	700	{
517	dSP;	701	dSP;
518	LOGOP myop;	702	LOGOP myop;
519		703
520	SvREFCNT_dec (GvAV (PL_defgv));
521	GvAV (PL_defgv) = coro->args; coro->args = 0;
522
523	Zero (&myop, 1, LOGOP);	704	Zero (&myop, 1, LOGOP);
524	myop.op_next = Nullop;	705	myop.op_next = Nullop;
525	myop.op_flags = OPf_WANT_VOID;	706	myop.op_flags = OPf_WANT_VOID;
526		707
527	PUSHMARK (SP);	708	PUSHMARK (SP);
528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	709	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
529	PUTBACK;	710	PUTBACK;
530	PL_op = (OP *)&myop;	711	PL_op = (OP *)&myop;
531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	712	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
532	SPAGAIN;	713	SPAGAIN;
533	}	714	}
534		715
535	ENTER; /* necessary e.g. for dounwind */	716	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
536	}	717	}
537		718
538	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
539	free_coro_mortal ()	756	free_coro_mortal (pTHX)
540	{	757	{
541	if (coro_mortal)	758	if (expect_true (coro_mortal))
542	{	759	{
543	SvREFCNT_dec (coro_mortal);	760	SvREFCNT_dec (coro_mortal);
544	coro_mortal = 0;	761	coro_mortal = 0;
545	}	762	}
546	}	763	}
547		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
548	/* 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 */
549	static void NOINLINE	892	static void NOINLINE
550	prepare_cctx (coro_cctx *cctx)	893	prepare_cctx (pTHX_ coro_cctx *cctx)
551	{	894	{
552	dSP;	895	dSP;
553	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;
554		902
555	Zero (&myop, 1, LOGOP);	903	Zero (&myop, 1, LOGOP);
556	myop.op_next = PL_op;	904	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	905	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		906
…		…
564	PL_op = (OP *)&myop;	912	PL_op = (OP *)&myop;
565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	913	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566	SPAGAIN;	914	SPAGAIN;
567	}	915	}
568		916
		917	/*
		918	* this is a _very_ stripped down perl interpreter ;)
		919	*/
569	static void	920	static void
570	coro_run (void *arg)	921	coro_run (void *arg)
571	{	922	{
		923	dTHX;
		924
572	/* coro_run is the alternative tail of transfer(), so unlock here. */	925	/* coro_run is the alternative tail of transfer(), so unlock here. */
573	UNLOCK;	926	UNLOCK;
574		927
575	/*	928	/* we now skip the entersub that lead to transfer() */
576	* this is a _very_ stripped down perl interpreter ;)	929	PL_op = PL_op->op_next;
577	*/
578	PL_top_env = &PL_start_env;
579		930
580	/* inject call to cctx_init */	931	/* inject a fake subroutine call to cctx_init */
581	prepare_cctx ((coro_cctx *)arg);	932	prepare_cctx (aTHX_ (coro_cctx *)arg);
582		933
583	/* 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 */
584	PL_restartop = PL_op;	935	PL_restartop = PL_op;
585	perl_run (PL_curinterp);	936	perl_run (PL_curinterp);
586		937
587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	938	/*
588	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 */
589	}	947	}
590		948
591	static coro_cctx *	949	static coro_cctx *
592	cctx_new ()	950	cctx_new ()
593	{	951	{
594	coro_cctx *cctx;	952	coro_cctx *cctx;
		953	void *stack_start;
		954	size_t stack_size;
595		955
596	++cctx_count;	956	++cctx_count;
597		957
598	Newz (0, cctx, 1, coro_cctx);	958	Newz (0, cctx, 1, coro_cctx);
599		959
600	#if HAVE_MMAP	960	#if HAVE_MMAP
601		961
602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	962	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
603	/* mmap supposedly does allocate-on-write for us */	963	/* mmap supposedly does allocate-on-write for us */
604	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	964	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605		965
606	if (cctx->sptr == (void *)-1)	966	if (cctx->sptr != (void *)-1)
607	{
608	perror ("FATAL: unable to mmap stack for coroutine");
609	_exit (EXIT_FAILURE);
610	}	967	{
611
612	# if STACKGUARD	968	# if CORO_STACKGUARD
613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	969	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
614	# endif	970	# endif
		971	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		972	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		973	cctx->flags |= CC_MAPPED;
		974	}
		975	else
		976	#endif
		977	{
		978	cctx->ssize = coro_stacksize * (long)sizeof (long);
		979	New (0, cctx->sptr, coro_stacksize, long);
615		980
616	#else
617
618	cctx->ssize = STACKSIZE * (long)sizeof (long);
619	New (0, cctx->sptr, STACKSIZE, long);
620
621	if (!cctx->sptr)	981	if (!cctx->sptr)
622	{	982	{
623	perror ("FATAL: unable to malloc stack for coroutine");	983	perror ("FATAL: unable to allocate stack for coroutine");
624	_exit (EXIT_FAILURE);	984	_exit (EXIT_FAILURE);
625	}	985	}
626		986
627	#endif	987	stack_start = cctx->sptr;
		988	stack_size = cctx->ssize;
		989	}
628		990
629	#if USE_VALGRIND	991	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
630	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
631	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
632	cctx->ssize + (char *)cctx->sptr
633	);
634	#endif
635
636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	992	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
637		993
638	return cctx;	994	return cctx;
639	}	995	}
640		996
641	static void	997	static void
…		…
644	if (!cctx)	1000	if (!cctx)
645	return;	1001	return;
646		1002
647	--cctx_count;	1003	--cctx_count;
648		1004
649	#if USE_VALGRIND	1005	#if CORO_USE_VALGRIND
650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1006	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
651	#endif	1007	#endif
652		1008
653	#if HAVE_MMAP	1009	#if HAVE_MMAP
		1010	if (cctx->flags & CC_MAPPED)
654	munmap (cctx->sptr, cctx->ssize);	1011	munmap (cctx->sptr, cctx->ssize);
655	#else	1012	else
		1013	#endif
656	Safefree (cctx->sptr);	1014	Safefree (cctx->sptr);
657	#endif
658		1015
659	Safefree (cctx);	1016	Safefree (cctx);
660	}	1017	}
661		1018
		1019	/* wether this cctx should be destructed */
		1020	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1021
662	static coro_cctx *	1022	static coro_cctx *
663	cctx_get ()	1023	cctx_get (pTHX)
664	{	1024	{
665	coro_cctx *cctx;	1025	while (expect_true (cctx_first))
666
667	if (cctx_first)
668	{	1026	{
669	cctx = cctx_first;	1027	coro_cctx *cctx = cctx_first;
670	cctx_first = cctx->next;	1028	cctx_first = cctx->next;
671	--cctx_idle;	1029	--cctx_idle;
672	}	1030
673	else	1031	if (expect_true (!CCTX_EXPIRED (cctx)))
674	{	1032	return cctx;
675	cctx = cctx_new ();	1033
676	PL_op = PL_op->op_next;	1034	cctx_destroy (cctx);
677	}	1035	}
678		1036
679	return cctx;	1037	return cctx_new ();
680	}	1038	}
681		1039
682	static void	1040	static void
683	cctx_put (coro_cctx *cctx)	1041	cctx_put (coro_cctx *cctx)
684	{	1042	{
685	/* free another cctx if overlimit */	1043	/* free another cctx if overlimit */
686	if (cctx_idle >= MAX_IDLE_CCTX)	1044	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
687	{	1045	{
688	coro_cctx *first = cctx_first;	1046	coro_cctx *first = cctx_first;
689	cctx_first = first->next;	1047	cctx_first = first->next;
690	--cctx_idle;	1048	--cctx_idle;
691		1049
692	assert (!first->inuse);
693	cctx_destroy (first);	1050	cctx_destroy (first);
694	}	1051	}
695		1052
696	++cctx_idle;	1053	++cctx_idle;
697	cctx->next = cctx_first;	1054	cctx->next = cctx_first;
698	cctx_first = cctx;	1055	cctx_first = cctx;
699	}	1056	}
700		1057
701	/* never call directly, always through the coro_state_transfer global variable */	1058	/** coroutine switching *****************************************************/
		1059
		1060	static void
		1061	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1062	{
		1063	if (expect_true (prev != next))
		1064	{
		1065	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1066	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1067
		1068	if (expect_false (next->flags & CF_RUNNING))
		1069	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1070
		1071	if (expect_false (next->flags & CF_DESTROYED))
		1072	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1073
		1074	if (
		1075	#if PERL_VERSION_ATLEAST (5,9,0)
		1076	expect_false (PL_parser)
		1077	#else
		1078	expect_false (PL_lex_state != LEX_NOTPARSING)
		1079	#endif
		1080	)
		1081	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1082	}
		1083	}
		1084
		1085	/* always use the TRANSFER macro */
702	static void NOINLINE	1086	static void NOINLINE
703	transfer (struct coro *prev, struct coro *next)	1087	transfer (pTHX_ struct coro *prev, struct coro *next)
704	{	1088	{
705	dSTACKLEVEL;	1089	dSTACKLEVEL;
706		1090
707	/* sometimes transfer is only called to set idle_sp */	1091	/* sometimes transfer is only called to set idle_sp */
708	if (!next)	1092	if (expect_false (!next))
709	{	1093	{
710	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1094	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
711	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */	1095	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
712	}	1096	}
713	else if (prev != next)	1097	else if (expect_true (prev != next))
714	{	1098	{
715	coro_cctx *prev__cctx;	1099	coro_cctx *prev__cctx;
716		1100
717	if (prev->flags & CF_NEW)	1101	if (expect_false (prev->flags & CF_NEW))
718	{	1102	{
719	/* create a new empty context */	1103	/* create a new empty context */
720	Newz (0, prev->cctx, 1, coro_cctx);	1104	Newz (0, prev->cctx, 1, coro_cctx);
721	prev->cctx->inuse = 1;
722	prev->flags &= ~CF_NEW;	1105	prev->flags &= ~CF_NEW;
723	prev->flags |= CF_RUNNING;	1106	prev->flags |= CF_RUNNING;
724	}	1107	}
725		1108
726	/*TODO: must not croak here */
727	if (!prev->flags & CF_RUNNING)
728	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
729
730	if (next->flags & CF_RUNNING)
731	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
732
733	prev->flags &= ~CF_RUNNING;	1109	prev->flags &= ~CF_RUNNING;
734	next->flags |= CF_RUNNING;	1110	next->flags |= CF_RUNNING;
735		1111
736	LOCK;	1112	LOCK;
737		1113
738	if (next->flags & CF_NEW)	1114	if (expect_false (next->flags & CF_NEW))
739	{	1115	{
740	/* need to start coroutine */	1116	/* need to start coroutine */
741	next->flags &= ~CF_NEW;	1117	next->flags &= ~CF_NEW;
742	/* first get rid of the old state */	1118	/* first get rid of the old state */
743	save_perl (prev);	1119	save_perl (aTHX_ prev);
744	/* setup coroutine call */	1120	/* setup coroutine call */
745	setup_coro (next);	1121	coro_setup (aTHX_ next);
746	/* need a new stack */
747	assert (!next->cctx);
748	}	1122	}
749	else	1123	else
750	{	1124	{
751	/* coroutine already started */	1125	/* coroutine already started */
752	save_perl (prev);	1126	save_perl (aTHX_ prev);
753	load_perl (next);	1127	load_perl (aTHX_ next);
754	}	1128	}
755		1129
756	prev__cctx = prev->cctx;	1130	prev__cctx = prev->cctx;
757		1131
758	/* possibly "free" the cctx */	1132	/* possibly "free" the cctx */
759	if (prev__cctx->idle_sp == STACKLEVEL)	1133	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
760	{	1134	{
761	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1135	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
762	assert (PL_top_env == prev__cctx->top_env);	1136	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
763		1137
764	prev->cctx = 0;	1138	prev->cctx = 0;
765		1139
		1140	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1141	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1142	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1143	next->cctx = cctx_get (aTHX);
		1144
766	cctx_put (prev__cctx);	1145	cctx_put (prev__cctx);
767	prev__cctx->inuse = 0;
768	}	1146	}
769		1147
		1148	++next->usecount;
		1149
770	if (!next->cctx)	1150	if (expect_true (!next->cctx))
771	{
772	next->cctx = cctx_get ();	1151	next->cctx = cctx_get (aTHX);
773	assert (!next->cctx->inuse);
774	next->cctx->inuse = 1;
775	}
776		1152
777	if (prev__cctx != next->cctx)	1153	if (expect_false (prev__cctx != next->cctx))
778	{	1154	{
779	prev__cctx->top_env = PL_top_env;	1155	prev__cctx->top_env = PL_top_env;
780	PL_top_env = next->cctx->top_env;	1156	PL_top_env = next->cctx->top_env;
781	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1157	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
782	}	1158	}
783		1159
784	free_coro_mortal ();	1160	free_coro_mortal (aTHX);
785
786	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	}
787	}	1175	}
788	}	1176	}
789		1177
790	struct transfer_args	1178	struct transfer_args
791	{	1179	{
792	struct coro *prev, *next;	1180	struct coro *prev, *next;
793	};	1181	};
794		1182
795	#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)
796		1185
		1186	/** high level stuff ********************************************************/
		1187
797	static void	1188	static int
798	coro_state_destroy (struct coro *coro)	1189	coro_state_destroy (pTHX_ struct coro *coro)
799	{	1190	{
800	if (coro->refcnt--)	1191	if (coro->flags & CF_DESTROYED)
801	return;	1192	return 0;
		1193
		1194	coro->flags |= CF_DESTROYED;
		1195
		1196	if (coro->flags & CF_READY)
		1197	{
		1198	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1199	/* alternative: look through all ready queues and remove the coro */
		1200	LOCK;
		1201	--coro_nready;
		1202	UNLOCK;
		1203	}
		1204	else
		1205	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
802		1206
803	if (coro->mainstack && coro->mainstack != main_mainstack)	1207	if (coro->mainstack && coro->mainstack != main_mainstack)
804	{	1208	{
805	struct coro temp;	1209	struct coro temp;
806	Zero (&temp, 1, struct coro);
807	temp.save = CORO_SAVE_ALL;
808		1210
809	if (coro->flags & CF_RUNNING)	1211	if (coro->flags & CF_RUNNING)
810	croak ("FATAL: tried to destroy currently running coroutine");	1212	croak ("FATAL: tried to destroy currently running coroutine");
811		1213
812	save_perl (&temp);	1214	save_perl (aTHX_ &temp);
813	load_perl (coro);	1215	load_perl (aTHX_ coro);
814		1216
815	coro_destroy_stacks ();	1217	coro_destroy (aTHX_ coro);
816		1218
817	load_perl (&temp); /* this will get rid of defsv etc.. */	1219	load_perl (aTHX_ &temp);
818		1220
819	coro->mainstack = 0;	1221	coro->slot = 0;
820	}	1222	}
821		1223
822	cctx_destroy (coro->cctx);	1224	cctx_destroy (coro->cctx);
823	SvREFCNT_dec (coro->args);	1225	SvREFCNT_dec (coro->args);
824	Safefree (coro);	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
		1231	return 1;
825	}	1232	}
826		1233
827	static int	1234	static int
828	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1235	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
829	{	1236	{
830	struct coro *coro = (struct coro *)mg->mg_ptr;	1237	struct coro *coro = (struct coro *)mg->mg_ptr;
831	mg->mg_ptr = 0;	1238	mg->mg_ptr = 0;
832		1239
		1240	coro->hv = 0;
		1241
		1242	if (--coro->refcnt < 0)
		1243	{
833	coro_state_destroy (coro);	1244	coro_state_destroy (aTHX_ coro);
		1245	Safefree (coro);
		1246	}
834		1247
835	return 0;	1248	return 0;
836	}	1249	}
837		1250
838	static int	1251	static int
…		…
845	return 0;	1258	return 0;
846	}	1259	}
847		1260
848	static MGVTBL coro_state_vtbl = {	1261	static MGVTBL coro_state_vtbl = {
849	0, 0, 0, 0,	1262	0, 0, 0, 0,
850	coro_state_clear,	1263	coro_state_free,
851	0,	1264	0,
852	#ifdef MGf_DUP	1265	#ifdef MGf_DUP
853	coro_state_dup,	1266	coro_state_dup,
854	#else	1267	#else
855	# define MGf_DUP 0	1268	# define MGf_DUP 0
856	#endif	1269	#endif
857	};	1270	};
858		1271
859	static struct coro *
860	SvSTATE (SV *coro)
861	{
862	HV *stash;
863	MAGIC *mg;
864
865	if (SvROK (coro))
866	coro = SvRV (coro);
867
868	stash = SvSTASH (coro);
869	if (stash != coro_stash && stash != coro_state_stash)
870	{
871	/* very slow, but rare, check */
872	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
873	croak ("Coro::State object required");
874	}
875
876	mg = SvMAGIC (coro);
877	assert (mg->mg_type == PERL_MAGIC_ext);
878	return (struct coro *)mg->mg_ptr;
879	}
880
881	static void	1272	static void
882	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)
883	{	1274	{
884	ta->prev = SvSTATE (prev_sv);	1275	ta->prev = SvSTATE (prev_sv);
885	ta->next = SvSTATE (next_sv);	1276	ta->next = SvSTATE (next_sv);
		1277	TRANSFER_CHECK (*ta);
886	}	1278	}
887		1279
888	static void	1280	static void
889	api_transfer (SV *prev_sv, SV *next_sv)	1281	api_transfer (SV *prev_sv, SV *next_sv)
890	{	1282	{
		1283	dTHX;
891	struct transfer_args ta;	1284	struct transfer_args ta;
892		1285
893	prepare_transfer (&ta, prev_sv, next_sv);	1286	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
894	TRANSFER (ta);	1287	TRANSFER (ta);
895	}	1288	}
896		1289
897	static int
898	api_save (SV *coro_sv, int new_save)
899	{
900	struct coro *coro = SvSTATE (coro_sv);
901	int old_save = coro->save;
902
903	if (new_save >= 0)
904	coro->save = new_save;
905
906	return old_save;
907	}
908
909	/** Coro ********************************************************************/	1290	/** Coro ********************************************************************/
910		1291
911	#define PRIO_MAX 3
912	#define PRIO_HIGH 1
913	#define PRIO_NORMAL 0
914	#define PRIO_LOW -1
915	#define PRIO_IDLE -3
916	#define PRIO_MIN -4
917
918	/* for Coro.pm */
919	static SV *coro_current;
920	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
921	static int coro_nready;
922
923	static void	1292	static void
924	coro_enq (SV *coro_sv)	1293	coro_enq (pTHX_ SV *coro_sv)
925	{	1294	{
926	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);
927	coro_nready++;
928	}	1296	}
929		1297
930	static SV *	1298	static SV *
931	coro_deq (int min_prio)	1299	coro_deq (pTHX_ int min_prio)
932	{	1300	{
933	int prio = PRIO_MAX - PRIO_MIN;	1301	int prio = PRIO_MAX - PRIO_MIN;
934		1302
935	min_prio -= PRIO_MIN;	1303	min_prio -= PRIO_MIN;
936	if (min_prio < 0)	1304	if (min_prio < 0)
937	min_prio = 0;	1305	min_prio = 0;
938		1306
939	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1307	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
940	if (AvFILLp (coro_ready [prio]) >= 0)	1308	if (AvFILLp (coro_ready [prio]) >= 0)
941	{
942	coro_nready--;
943	return av_shift (coro_ready [prio]);	1309	return av_shift (coro_ready [prio]);
944	}
945		1310
946	return 0;	1311	return 0;
947	}	1312	}
948		1313
949	static int	1314	static int
950	api_ready (SV *coro_sv)	1315	api_ready (SV *coro_sv)
951	{	1316	{
		1317	dTHX;
952	struct coro *coro;	1318	struct coro *coro;
953		1319
954	if (SvROK (coro_sv))	1320	if (SvROK (coro_sv))
955	coro_sv = SvRV (coro_sv);	1321	coro_sv = SvRV (coro_sv);
956		1322
…		…
960	return 0;	1326	return 0;
961		1327
962	coro->flags |= CF_READY;	1328	coro->flags |= CF_READY;
963		1329
964	LOCK;	1330	LOCK;
965	coro_enq (SvREFCNT_inc (coro_sv));	1331	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1332	++coro_nready;
966	UNLOCK;	1333	UNLOCK;
967		1334
968	return 1;	1335	return 1;
969	}	1336	}
970		1337
971	static int	1338	static int
972	api_is_ready (SV *coro_sv)	1339	api_is_ready (SV *coro_sv)
973	{	1340	{
		1341	dTHX;
974	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1342	return !!(SvSTATE (coro_sv)->flags & CF_READY);
975	}	1343	}
976		1344
977	static void	1345	static void
978	prepare_schedule (struct transfer_args *ta)	1346	prepare_schedule (pTHX_ struct transfer_args *ta)
979	{	1347	{
980	SV *prev, *next;	1348	SV *prev_sv, *next_sv;
981		1349
982	for (;;)	1350	for (;;)
983	{	1351	{
984	LOCK;	1352	LOCK;
985	next = coro_deq (PRIO_MIN);	1353	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1354
		1355	/* nothing to schedule: call the idle handler */
		1356	if (expect_false (!next_sv))
		1357	{
		1358	dSP;
		1359	UNLOCK;
		1360
		1361	ENTER;
		1362	SAVETMPS;
		1363
		1364	PUSHMARK (SP);
		1365	PUTBACK;
		1366	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1367
		1368	FREETMPS;
		1369	LEAVE;
		1370	continue;
		1371	}
		1372
		1373	ta->next = SvSTATE (next_sv);
		1374
		1375	/* cannot transfer to destroyed coros, skip and look for next */
		1376	if (expect_false (ta->next->flags & CF_DESTROYED))
		1377	{
		1378	UNLOCK;
		1379	SvREFCNT_dec (next_sv);
		1380	/* coro_nready is already taken care of by destroy */
		1381	continue;
		1382	}
		1383
		1384	--coro_nready;
986	UNLOCK;	1385	UNLOCK;
987
988	if (next)
989	break;	1386	break;
990
991	{
992	dSP;
993
994	ENTER;
995	SAVETMPS;
996
997	PUSHMARK (SP);
998	PUTBACK;
999	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1000
1001	FREETMPS;
1002	LEAVE;
1003	}	1387	}
1004	}
1005
1006	prev = SvRV (coro_current);
1007	SvRV_set (coro_current, next);
1008		1388
1009	/* free this only after the transfer */	1389	/* free this only after the transfer */
1010	LOCK;	1390	prev_sv = SvRV (coro_current);
1011	free_coro_mortal ();
1012	UNLOCK;
1013	coro_mortal = prev;
1014
1015	assert (!SvROK(prev));//D
1016	assert (!SvROK(next));//D
1017
1018	ta->prev = SvSTATE (prev);	1391	ta->prev = SvSTATE (prev_sv);
1019	ta->next = SvSTATE (next);	1392	TRANSFER_CHECK (*ta);
1020
1021	assert (ta->next->flags & CF_READY);	1393	assert (ta->next->flags & CF_READY);
1022	ta->next->flags &= ~CF_READY;	1394	ta->next->flags &= ~CF_READY;
1023	}	1395	SvRV_set (coro_current, next_sv);
1024		1396
		1397	LOCK;
		1398	free_coro_mortal (aTHX);
		1399	coro_mortal = prev_sv;
		1400	UNLOCK;
		1401	}
		1402
1025	static void	1403	static void
1026	prepare_cede (struct transfer_args *ta)	1404	prepare_cede (pTHX_ struct transfer_args *ta)
1027	{	1405	{
1028	api_ready (coro_current);	1406	api_ready (coro_current);
1029
1030	prepare_schedule (ta);	1407	prepare_schedule (aTHX_ ta);
		1408	}
		1409
		1410	static int
		1411	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1412	{
		1413	if (coro_nready)
		1414	{
		1415	SV *prev = SvRV (coro_current);
		1416	prepare_schedule (aTHX_ ta);
		1417	api_ready (prev);
		1418	return 1;
		1419	}
		1420	else
		1421	return 0;
1031	}	1422	}
1032		1423
1033	static void	1424	static void
1034	api_schedule (void)	1425	api_schedule (void)
1035	{	1426	{
		1427	dTHX;
1036	struct transfer_args ta;	1428	struct transfer_args ta;
1037		1429
1038	prepare_schedule (&ta);	1430	prepare_schedule (aTHX_ &ta);
1039	TRANSFER (ta);	1431	TRANSFER (ta);
1040	}	1432	}
1041		1433
1042	static void	1434	static int
1043	api_cede (void)	1435	api_cede (void)
1044	{	1436	{
		1437	dTHX;
1045	struct transfer_args ta;	1438	struct transfer_args ta;
1046		1439
1047	prepare_cede (&ta);	1440	prepare_cede (aTHX_ &ta);
		1441
		1442	if (expect_true (ta.prev != ta.next))
		1443	{
1048	TRANSFER (ta);	1444	TRANSFER (ta);
		1445	return 1;
		1446	}
		1447	else
		1448	return 0;
1049	}	1449	}
1050		1450
		1451	static int
		1452	api_cede_notself (void)
		1453	{
		1454	dTHX;
		1455	struct transfer_args ta;
		1456
		1457	if (prepare_cede_notself (aTHX_ &ta))
		1458	{
		1459	TRANSFER (ta);
		1460	return 1;
		1461	}
		1462	else
		1463	return 0;
		1464	}
		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
1051	MODULE = Coro::State PACKAGE = Coro::State	1492	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1052		1493
1053	PROTOTYPES: DISABLE	1494	PROTOTYPES: DISABLE
1054		1495
1055	BOOT:	1496	BOOT:
1056	{	1497	{
1057	#ifdef USE_ITHREADS	1498	#ifdef USE_ITHREADS
1058	MUTEX_INIT (&coro_mutex);	1499	MUTEX_INIT (&coro_mutex);
1059	#endif	1500	#endif
1060	BOOT_PAGESIZE;	1501	BOOT_PAGESIZE;
1061		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
1062	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1513	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1063		1514
		1515	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1516	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1064	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1065	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1066	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1067	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1068	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1069		1519
1070	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;
1071		1525
1072	coroapi.ver = CORO_API_VERSION;	1526	coroapi.ver = CORO_API_VERSION;
1073	coroapi.transfer = api_transfer;	1527	coroapi.transfer = api_transfer;
1074		1528
1075	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1529	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1082	struct coro *coro;	1536	struct coro *coro;
1083	HV *hv;	1537	HV *hv;
1084	int i;	1538	int i;
1085		1539
1086	Newz (0, coro, 1, struct coro);	1540	Newz (0, coro, 1, struct coro);
1087	coro->args = newAV ();	1541	coro->args = newAV ();
1088	coro->save = CORO_SAVE_ALL;
1089	coro->flags = CF_NEW;	1542	coro->flags = CF_NEW;
1090		1543
		1544	if (coro_first) coro_first->prev = coro;
		1545	coro->next = coro_first;
		1546	coro_first = coro;
		1547
1091	hv = newHV ();	1548	coro->hv = hv = newHV ();
1092	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;
1093	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1550	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1094		1551
		1552	av_extend (coro->args, items - 1);
1095	for (i = 1; i < items; i++)	1553	for (i = 1; i < items; i++)
1096	av_push (coro->args, newSVsv (ST (i)));	1554	av_push (coro->args, newSVsv (ST (i)));
1097	}	1555	}
1098	OUTPUT:	1556	OUTPUT:
1099	RETVAL	1557	RETVAL
1100		1558
1101	int	1559	# these not obviously related functions are all rolled into the same xs
1102	save (SV *coro, int new_save = -1)	1560	# function to increase chances that they all will call transfer with the same
1103	CODE:	1561	# stack offset
1104	RETVAL = api_save (coro, new_save);
1105	OUTPUT:
1106	RETVAL
1107
1108	void	1562	void
1109	_set_stacklevel (...)	1563	_set_stacklevel (...)
1110	ALIAS:	1564	ALIAS:
1111	Coro::State::transfer = 1	1565	Coro::State::transfer = 1
1112	Coro::schedule = 2	1566	Coro::schedule = 2
1113	Coro::cede = 3	1567	Coro::cede = 3
		1568	Coro::cede_notself = 4
1114	CODE:	1569	CODE:
1115	{	1570	{
1116	struct transfer_args ta;	1571	struct transfer_args ta;
1117		1572
1118	switch (ix)	1573	switch (ix)
…		…
1124		1579
1125	case 1:	1580	case 1:
1126	if (items != 2)	1581	if (items != 2)
1127	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);
1128		1583
1129	prepare_transfer (&ta, ST (0), ST (1));	1584	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1130	break;	1585	break;
1131		1586
1132	case 2:	1587	case 2:
1133	prepare_schedule (&ta);	1588	prepare_schedule (aTHX_ &ta);
1134	break;	1589	break;
1135		1590
1136	case 3:	1591	case 3:
1137	prepare_cede (&ta);	1592	prepare_cede (aTHX_ &ta);
		1593	break;
		1594
		1595	case 4:
		1596	if (!prepare_cede_notself (aTHX_ &ta))
		1597	XSRETURN_EMPTY;
		1598
1138	break;	1599	break;
1139	}	1600	}
1140		1601
		1602	BARRIER;
1141	TRANSFER (ta);	1603	TRANSFER (ta);
1142	}
1143		1604
1144	void	1605	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1145	_clone_state_from (SV *dst, SV *src)	1606	XSRETURN_YES;
		1607	}
		1608
		1609	bool
		1610	_destroy (SV *coro_sv)
1146	CODE:	1611	CODE:
1147	{	1612	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1148	struct coro *coro_src = SvSTATE (src);	1613	OUTPUT:
1149		1614	RETVAL
1150	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1151
1152	++coro_src->refcnt;
1153	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1154	}
1155		1615
1156	void	1616	void
1157	_exit (code)	1617	_exit (code)
1158	int code	1618	int code
1159	PROTOTYPE: $	1619	PROTOTYPE: $
1160	CODE:	1620	CODE:
1161	_exit (code);	1621	_exit (code);
1162		1622
1163	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
1164	cctx_count ()	1633	cctx_count ()
1165	CODE:	1634	CODE:
1166	RETVAL = cctx_count;	1635	RETVAL = cctx_count;
1167	OUTPUT:	1636	OUTPUT:
1168	RETVAL	1637	RETVAL
…		…
1172	CODE:	1641	CODE:
1173	RETVAL = cctx_idle;	1642	RETVAL = cctx_idle;
1174	OUTPUT:	1643	OUTPUT:
1175	RETVAL	1644	RETVAL
1176		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
1177	MODULE = Coro::State PACKAGE = Coro	1745	MODULE = Coro::State PACKAGE = Coro
1178		1746
1179	BOOT:	1747	BOOT:
1180	{	1748	{
1181	int i;	1749	int i;
1182		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
1183	coro_stash = gv_stashpv ("Coro", TRUE);	1758	coro_stash = gv_stashpv ("Coro", TRUE);
1184		1759
1185	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1760	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1186	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1761	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1187	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1762	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1188	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1763	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1189	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1764	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1190	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1765	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1191		1766
1192	coro_current = get_sv ("Coro::current", FALSE);
1193	SvREADONLY_on (coro_current);
1194
1195	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1767	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1196	coro_ready[i] = newAV ();	1768	coro_ready[i] = newAV ();
1197		1769
1198	{	1770	{
1199	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 */
1200		1773
1201	coroapi.schedule = api_schedule;	1774	coroapi.schedule = api_schedule;
1202	coroapi.save = api_save;
1203	coroapi.cede = api_cede;	1775	coroapi.cede = api_cede;
		1776	coroapi.cede_notself = api_cede_notself;
1204	coroapi.ready = api_ready;	1777	coroapi.ready = api_ready;
1205	coroapi.is_ready = api_is_ready;	1778	coroapi.is_ready = api_is_ready;
1206	coroapi.nready = &coro_nready;	1779	coroapi.nready = &coro_nready;
1207	coroapi.current = coro_current;	1780	coroapi.current = coro_current;
1208		1781
1209	GCoroAPI = &coroapi;	1782	GCoroAPI = &coroapi;
1210	sv_setiv (sv, (IV)&coroapi);	1783	sv_setiv (sv, (IV)&coroapi);
1211	SvREADONLY_on (sv);	1784	SvREADONLY_on (sv);
1212	}	1785	}
…		…
1247	CODE:	1820	CODE:
1248	RETVAL = boolSV (api_ready (self));	1821	RETVAL = boolSV (api_ready (self));
1249	OUTPUT:	1822	OUTPUT:
1250	RETVAL	1823	RETVAL
1251		1824
1252	SV *
1253	is_ready (SV *self)
1254	PROTOTYPE: $
1255	CODE:
1256	RETVAL = boolSV (api_is_ready (self));
1257	OUTPUT:
1258	RETVAL
1259
1260	int	1825	int
1261	nready (...)	1826	nready (...)
1262	PROTOTYPE:	1827	PROTOTYPE:
1263	CODE:	1828	CODE:
1264	RETVAL = coro_nready;	1829	RETVAL = coro_nready;
1265	OUTPUT:	1830	OUTPUT:
1266	RETVAL	1831	RETVAL
1267		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
1268	MODULE = Coro::State PACKAGE = Coro::AIO	1904	MODULE = Coro::State PACKAGE = Coro::AIO
1269		1905
1270	SV *	1906	SV *
1271	_get_state ()	1907	_get_state ()
1272	CODE:	1908	CODE:

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