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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.131 by root, Fri Dec 29 11:37:49 2006 UTC vs.
Revision 1.202 by root, Mon Oct 8 02:50:23 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)
98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
99	#else	113	#else
100	# define attribute(x)	114	# define attribute(x)
101	# define BARRIER	115	# define BARRIER
		116	# define expect(expr,value) (expr)
102	#endif	117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
103		121
104	#define NOINLINE attribute ((noinline))	122	#define NOINLINE attribute ((noinline))
105		123
106	#include "CoroAPI.h"	124	#include "CoroAPI.h"
107		125
…		…
112	#else	130	#else
113	# define LOCK (void)0	131	# define LOCK (void)0
114	# define UNLOCK (void)0	132	# define UNLOCK (void)0
115	#endif	133	#endif
116		134
		135	#define strpair(const) const, sizeof (const) - 1
		136
		137	/* helper storage struct for Coro::AIO */
117	struct io_state	138	struct io_state
118	{	139	{
119	int errorno;	140	int errorno;
120	I32 laststype;	141	I32 laststype;
121	int laststatval;	142	int laststatval;
122	Stat_t statcache;	143	Stat_t statcache;
123	};	144	};
124		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
125	static struct CoroAPI coroapi;	147	static struct CoroAPI coroapi;
126	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;
127	static HV *coro_state_stash, *coro_stash;	150	static HV *coro_state_stash, *coro_stash;
128	static SV *coro_mortal; /* will be freed after next transfer */	151	static SV *coro_mortal; /* will be freed after next transfer */
129		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
130	static struct coro_cctx *cctx_first;	165	static struct coro_cctx *cctx_first;
131	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	};
132		176
133	/* this is a structure representing a c-level coroutine */	177	/* this is a structure representing a c-level coroutine */
134	typedef struct coro_cctx {	178	typedef struct coro_cctx {
135	struct coro_cctx *next;	179	struct coro_cctx *next;
136		180
137	/* the stack */	181	/* the stack */
138	void *sptr;	182	void *sptr;
139	long ssize; /* positive == mmap, otherwise malloc */	183	size_t ssize;
140		184
141	/* cpu state */	185	/* cpu state */
142	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 */
143	JMPENV *top_env;	188	JMPENV *top_env;
144	coro_context cctx;	189	coro_context cctx;
145		190
146	int inuse;
147
148	#if USE_VALGRIND	191	#if CORO_USE_VALGRIND
149	int valgrind_id;	192	int valgrind_id;
150	#endif	193	#endif
		194	unsigned char flags;
151	} coro_cctx;	195	} coro_cctx;
152		196
153	enum {	197	enum {
154	CF_RUNNING = 0x0001, /* coroutine is running */	198	CF_RUNNING = 0x0001, /* coroutine is running */
155	CF_READY = 0x0002, /* coroutine is ready */	199	CF_READY = 0x0002, /* coroutine is ready */
156	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 */
157	};	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))
158		216
159	/* this is a structure representing a perl-level coroutine */	217	/* this is a structure representing a perl-level coroutine */
160	struct coro {	218	struct coro {
161	/* the c coroutine allocated to this perl coroutine, if any */	219	/* the c coroutine allocated to this perl coroutine, if any */
162	coro_cctx *cctx;	220	coro_cctx *cctx;
163		221
		222	/* process data */
		223	AV *mainstack;
		224	perl_slots *slot; /* basically the saved sp */
		225
164	/* data associated with this coroutine (initial args) */	226	/* data associated with this coroutine (initial args) */
165	AV *args;	227	AV *args;
166	int refcnt;	228	int refcnt;
167	int save; /* CORO_SAVE flags */
168	int flags; /* CF_ flags */	229	int flags; /* CF_ flags */
169		230
170	/* optionally saved, might be zero */	231	/* statistics */
171	AV *defav; /* @_ */	232	int usecount; /* number of transfers to this coro */
172	SV *defsv; /* $_ */
173	SV *errsv; /* $@ */
174	SV *irssv; /* $/ */
175	SV *irssv_sv; /* real $/ cache */
176
177	#define VAR(name,type) type name;
178	# include "state.h"
179	#undef VAR
180		233
181	/* coro process data */	234	/* coro process data */
182	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 */
183	};	244	};
184		245
185	typedef struct coro *Coro__State;	246	typedef struct coro *Coro__State;
186	typedef struct coro *Coro__State_or_hashref;	247	typedef struct coro *Coro__State_or_hashref;
187		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
188	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 *
189	coro_clone_padlist (CV *cv)	297	coro_clone_padlist (pTHX_ CV *cv)
190	{	298	{
191	AV *padlist = CvPADLIST (cv);	299	AV *padlist = CvPADLIST (cv);
192	AV *newpadlist, *newpad;	300	AV *newpadlist, *newpad;
193		301
194	newpadlist = newAV ();	302	newpadlist = newAV ();
…		…
206		314
207	return newpadlist;	315	return newpadlist;
208	}	316	}
209		317
210	static void	318	static void
211	free_padlist (AV *padlist)	319	free_padlist (pTHX_ AV *padlist)
212	{	320	{
213	/* may be during global destruction */	321	/* may be during global destruction */
214	if (SvREFCNT (padlist))	322	if (SvREFCNT (padlist))
215	{	323	{
216	I32 i = AvFILLp (padlist);	324	I32 i = AvFILLp (padlist);
…		…
237	AV *padlist;	345	AV *padlist;
238	AV *av = (AV *)mg->mg_obj;	346	AV *av = (AV *)mg->mg_obj;
239		347
240	/* casting is fun. */	348	/* casting is fun. */
241	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	349	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
242	free_padlist (padlist);	350	free_padlist (aTHX_ padlist);
243		351
244	SvREFCNT_dec (av);	352	SvREFCNT_dec (av);
245		353
246	return 0;	354	return 0;
247	}	355	}
…		…
255	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	363	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
256	? SvMAGIC (cv) \	364	? SvMAGIC (cv) \
257	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	365	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
258	: 0	366	: 0
259		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
260	/* the next two functions merely cache the padlists */	394	/* the next two functions merely cache the padlists */
261	static void	395	static void
262	get_padlist (CV *cv)	396	get_padlist (pTHX_ CV *cv)
263	{	397	{
264	MAGIC *mg = CORO_MAGIC (cv);	398	MAGIC *mg = CORO_MAGIC (cv);
265	AV *av;	399	AV *av;
266		400
267	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	401	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
268	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	402	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
269	else	403	else
270	{	404	{
271	#if PREFER_PERL_FUNCTIONS	405	#if CORO_PREFER_PERL_FUNCTIONS
272	/* this is probably cleaner, but also slower? */	406	/* this is probably cleaner, but also slower? */
273	CV *cp = Perl_cv_clone (cv);	407	CV *cp = Perl_cv_clone (cv);
274	CvPADLIST (cv) = CvPADLIST (cp);	408	CvPADLIST (cv) = CvPADLIST (cp);
275	CvPADLIST (cp) = 0;	409	CvPADLIST (cp) = 0;
276	SvREFCNT_dec (cp);	410	SvREFCNT_dec (cp);
277	#else	411	#else
278	CvPADLIST (cv) = coro_clone_padlist (cv);	412	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
279	#endif	413	#endif
280	}	414	}
281	}	415	}
282		416
283	static void	417	static void
284	put_padlist (CV *cv)	418	put_padlist (pTHX_ CV *cv)
285	{	419	{
286	MAGIC *mg = CORO_MAGIC (cv);	420	MAGIC *mg = CORO_MAGIC (cv);
287	AV *av;	421	AV *av;
288		422
289	if (!mg)	423	if (expect_false (!mg))
290	{	424	{
291	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	425	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
292	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	426	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
293	mg->mg_virtual = &vtbl_coro;	427	mg->mg_virtual = &vtbl_coro;
294	mg->mg_obj = (SV *)newAV ();	428	mg->mg_obj = (SV *)newAV ();
295	}	429	}
296		430
297	av = (AV *)mg->mg_obj;	431	av = (AV *)mg->mg_obj;
298		432
299	if (AvFILLp (av) >= AvMAX (av))	433	if (expect_false (AvFILLp (av) >= AvMAX (av)))
300	av_extend (av, AvMAX (av) + 1);	434	av_extend (av, AvMAX (av) + 1);
301		435
302	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	436	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
303	}	437	}
304		438
305	#define SB do {	439	/** load & save, init *******************************************************/
306	#define SE } while (0)
307		440
308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
309
310	static void	441	static void
311	load_perl (Coro__State c)	442	load_perl (pTHX_ Coro__State c)
312	{	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
313	#define VAR(name,type) PL_ ## name = c->name;	454	#define VAR(name,type) PL_ ## name = slot->name;
314	# include "state.h"	455	# include "state.h"
315	#undef VAR	456	#undef VAR
316		457
317	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	458	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
318	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	459	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
319	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
320	if (c->irssv)
321	{
322	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
323	SvREFCNT_dec (c->irssv);
324	else
325	{
326	REPLACE_SV (PL_rs, c->irssv);
327	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
328	sv_setsv (c->irssv_sv, PL_rs);
329	}
330	}
331		460
332	{	461	{
333	dSP;	462	dSP;
		463
334	CV *cv;	464	CV *cv;
335		465
336	/* now do the ugly restore mess */	466	/* now do the ugly restore mess */
337	while ((cv = (CV *)POPs))	467	while (expect_true (cv = (CV *)POPs))
338	{	468	{
339	put_padlist (cv); /* mark this padlist as available */	469	put_padlist (aTHX_ cv); /* mark this padlist as available */
340	CvDEPTH (cv) = PTR2IV (POPs);	470	CvDEPTH (cv) = PTR2IV (POPs);
341	CvPADLIST (cv) = (AV *)POPs;	471	CvPADLIST (cv) = (AV *)POPs;
342	}	472	}
343		473
344	PUTBACK;	474	PUTBACK;
345	}	475	}
346	}	476	}
347		477
348	static void	478	static void
349	save_perl (Coro__State c)	479	save_perl (pTHX_ Coro__State c)
350	{	480	{
351	{	481	{
352	dSP;	482	dSP;
353	I32 cxix = cxstack_ix;	483	I32 cxix = cxstack_ix;
354	PERL_CONTEXT *ccstk = cxstack;	484	PERL_CONTEXT *ccstk = cxstack;
…		…
357	/*	487	/*
358	* the worst thing you can imagine happens first - we have to save	488	* the worst thing you can imagine happens first - we have to save
359	* (and reinitialize) all cv's in the whole callchain :(	489	* (and reinitialize) all cv's in the whole callchain :(
360	*/	490	*/
361		491
362	EXTEND (SP, 3 + 1);
363	PUSHs (Nullsv);	492	XPUSHs (Nullsv);
364	/* this loop was inspired by pp_caller */	493	/* this loop was inspired by pp_caller */
365	for (;;)	494	for (;;)
366	{	495	{
367	while (cxix >= 0)	496	while (expect_true (cxix >= 0))
368	{	497	{
369	PERL_CONTEXT *cx = &ccstk[cxix--];	498	PERL_CONTEXT *cx = &ccstk[cxix--];
370		499
371	if (CxTYPE (cx) == CXt_SUB)	500	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
372	{	501	{
373	CV *cv = cx->blk_sub.cv;	502	CV *cv = cx->blk_sub.cv;
374		503
375	if (CvDEPTH (cv))	504	if (expect_true (CvDEPTH (cv)))
376	{	505	{
377	EXTEND (SP, 3);	506	EXTEND (SP, 3);
378	PUSHs ((SV *)CvPADLIST (cv));	507	PUSHs ((SV *)CvPADLIST (cv));
379	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	508	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
380	PUSHs ((SV *)cv);	509	PUSHs ((SV *)cv);
381		510
382	CvDEPTH (cv) = 0;	511	CvDEPTH (cv) = 0;
383	get_padlist (cv);	512	get_padlist (aTHX_ cv);
384	}	513	}
385	}	514	}
386	}	515	}
387		516
388	if (top_si->si_type == PERLSI_MAIN)	517	if (expect_true (top_si->si_type == PERLSI_MAIN))
389	break;	518	break;
390		519
391	top_si = top_si->si_prev;	520	top_si = top_si->si_prev;
392	ccstk = top_si->si_cxstack;	521	ccstk = top_si->si_cxstack;
393	cxix = top_si->si_cxix;	522	cxix = top_si->si_cxix;
394	}	523	}
395		524
396	PUTBACK;	525	PUTBACK;
397	}	526	}
398		527
399	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	528	/* allocate some space on the context stack for our purposes */
400	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	529	/* we manually unroll here, as usually 2 slots is enough */
401	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	530	if (SLOT_COUNT >= 1) CXINC;
402	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	531	if (SLOT_COUNT >= 2) CXINC;
		532	if (SLOT_COUNT >= 3) CXINC;
		533	{
		534	int i;
		535	for (i = 3; i < SLOT_COUNT; ++i)
		536	CXINC;
		537	}
		538	cxstack_ix -= SLOT_COUNT; /* undo allocation */
403		539
		540	c->mainstack = PL_mainstack;
		541
		542	{
		543	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		544
		545	slot->defav = GvAV (PL_defgv);
		546	slot->defsv = DEFSV;
		547	slot->errsv = ERRSV;
		548	slot->irsgv = GvSV (irsgv);
		549
404	#define VAR(name,type)c->name = PL_ ## name;	550	#define VAR(name,type) slot->name = PL_ ## name;
405	# include "state.h"	551	# include "state.h"
406	#undef VAR	552	#undef VAR
		553	}
407	}	554	}
408		555
409	/*	556	/*
410	* allocate various perl stacks. This is an exact copy	557	* allocate various perl stacks. This is an exact copy
411	* of perl.c:init_stacks, except that it uses less memory	558	* of perl.c:init_stacks, except that it uses less memory
412	* on the (sometimes correct) assumption that coroutines do	559	* on the (sometimes correct) assumption that coroutines do
413	* not usually need a lot of stackspace.	560	* not usually need a lot of stackspace.
414	*/	561	*/
415	#if PREFER_PERL_FUNCTIONS	562	#if 1
416	# define coro_init_stacks init_stacks	563	# define coro_init_stacks init_stacks
417	#else	564	#else
418	static void	565	static void
419	coro_init_stacks ()	566	coro_init_stacks (pTHX)
420	{	567	{
421	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	568	PL_curstackinfo = new_stackinfo(32, 8);
422	PL_curstackinfo->si_type = PERLSI_MAIN;	569	PL_curstackinfo->si_type = PERLSI_MAIN;
423	PL_curstack = PL_curstackinfo->si_stack;	570	PL_curstack = PL_curstackinfo->si_stack;
424	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	571	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
425		572
426	PL_stack_base = AvARRAY(PL_curstack);	573	PL_stack_base = AvARRAY(PL_curstack);
427	PL_stack_sp = PL_stack_base;	574	PL_stack_sp = PL_stack_base;
428	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	575	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
429		576
430	New(50,PL_tmps_stack,128,SV*);	577	New(50,PL_tmps_stack,32,SV*);
431	PL_tmps_floor = -1;	578	PL_tmps_floor = -1;
432	PL_tmps_ix = -1;	579	PL_tmps_ix = -1;
433	PL_tmps_max = 128;	580	PL_tmps_max = 32;
434		581
435	New(54,PL_markstack,32,I32);	582	New(54,PL_markstack,16,I32);
436	PL_markstack_ptr = PL_markstack;	583	PL_markstack_ptr = PL_markstack;
437	PL_markstack_max = PL_markstack + 32;	584	PL_markstack_max = PL_markstack + 16;
438		585
439	#ifdef SET_MARK_OFFSET	586	#ifdef SET_MARK_OFFSET
440	SET_MARK_OFFSET;	587	SET_MARK_OFFSET;
441	#endif	588	#endif
442		589
443	New(54,PL_scopestack,32,I32);	590	New(54,PL_scopestack,8,I32);
444	PL_scopestack_ix = 0;	591	PL_scopestack_ix = 0;
445	PL_scopestack_max = 32;	592	PL_scopestack_max = 8;
446		593
447	New(54,PL_savestack,64,ANY);	594	New(54,PL_savestack,24,ANY);
448	PL_savestack_ix = 0;	595	PL_savestack_ix = 0;
449	PL_savestack_max = 64;	596	PL_savestack_max = 24;
450		597
451	#if !PERL_VERSION_ATLEAST (5,9,0)	598	#if !PERL_VERSION_ATLEAST (5,9,0)
452	New(54,PL_retstack,16,OP*);	599	New(54,PL_retstack,4,OP*);
453	PL_retstack_ix = 0;	600	PL_retstack_ix = 0;
454	PL_retstack_max = 16;	601	PL_retstack_max = 4;
455	#endif	602	#endif
456	}	603	}
457	#endif	604	#endif
458		605
459	/*	606	/*
460	* destroy the stacks, the callchain etc...	607	* destroy the stacks, the callchain etc...
461	*/	608	*/
462	static void	609	static void
463	coro_destroy_stacks ()	610	coro_destroy_stacks (pTHX)
464	{	611	{
465	if (!IN_DESTRUCT)
466	{
467	/* restore all saved variables and stuff */
468	LEAVE_SCOPE (0);
469	assert (PL_tmps_floor == -1);
470
471	/* free all temporaries */
472	FREETMPS;
473	assert (PL_tmps_ix == -1);
474
475	POPSTACK_TO (PL_mainstack);
476	}
477
478	while (PL_curstackinfo->si_next)	612	while (PL_curstackinfo->si_next)
479	PL_curstackinfo = PL_curstackinfo->si_next;	613	PL_curstackinfo = PL_curstackinfo->si_next;
480		614
481	while (PL_curstackinfo)	615	while (PL_curstackinfo)
482	{	616	{
…		…
497	#if !PERL_VERSION_ATLEAST (5,9,0)	631	#if !PERL_VERSION_ATLEAST (5,9,0)
498	Safefree (PL_retstack);	632	Safefree (PL_retstack);
499	#endif	633	#endif
500	}	634	}
501		635
502	static void	636	static size_t
503	setup_coro (struct coro *coro)	637	coro_rss (pTHX_ struct coro *coro)
		638	{
		639	size_t rss = sizeof (*coro);
		640
		641	if (coro->mainstack)
		642	{
		643	perl_slots tmp_slot;
		644	perl_slots *slot;
		645
		646	if (coro->flags & CF_RUNNING)
		647	{
		648	slot = &tmp_slot;
		649
		650	#define VAR(name,type) slot->name = PL_ ## name;
		651	# include "state.h"
		652	#undef VAR
		653	}
		654	else
		655	slot = coro->slot;
		656
		657	rss += sizeof (slot->curstackinfo);
		658	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		659	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		660	rss += slot->tmps_max * sizeof (SV *);
		661	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		662	rss += slot->scopestack_max * sizeof (I32);
		663	rss += slot->savestack_max * sizeof (ANY);
		664
		665	#if !PERL_VERSION_ATLEAST (5,9,0)
		666	rss += slot->retstack_max * sizeof (OP *);
		667	#endif
		668	}
		669
		670	return rss;
		671	}
		672
		673	/** coroutine stack handling ************************************************/
		674
		675	static void
		676	coro_setup (pTHX_ struct coro *coro)
504	{	677	{
505	/*	678	/*
506	* emulate part of the perl startup here.	679	* emulate part of the perl startup here.
507	*/	680	*/
508
509	coro_init_stacks ();	681	coro_init_stacks (aTHX);
510		682
		683	PL_runops = RUNOPS_DEFAULT;
511	PL_curcop = &PL_compiling;	684	PL_curcop = &PL_compiling;
512	PL_in_eval = EVAL_NULL;	685	PL_in_eval = EVAL_NULL;
		686	PL_comppad = 0;
513	PL_curpm = 0;	687	PL_curpm = 0;
		688	PL_curpad = 0;
514	PL_localizing = 0;	689	PL_localizing = 0;
515	PL_dirty = 0;	690	PL_dirty = 0;
516	PL_restartop = 0;	691	PL_restartop = 0;
		692	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		693	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		694
		695	GvSV (PL_defgv) = newSV (0);
		696	GvAV (PL_defgv) = coro->args; coro->args = 0;
		697	GvSV (PL_errgv) = newSV (0);
		698	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		699	PL_rs = newSVsv (GvSV (irsgv));
		700	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
517		701
518	{	702	{
519	dSP;	703	dSP;
520	LOGOP myop;	704	LOGOP myop;
521		705
522	SvREFCNT_dec (GvAV (PL_defgv));
523	GvAV (PL_defgv) = coro->args; coro->args = 0;
524
525	Zero (&myop, 1, LOGOP);	706	Zero (&myop, 1, LOGOP);
526	myop.op_next = Nullop;	707	myop.op_next = Nullop;
527	myop.op_flags = OPf_WANT_VOID;	708	myop.op_flags = OPf_WANT_VOID;
528		709
529	PUSHMARK (SP);	710	PUSHMARK (SP);
530	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	711	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
531	PUTBACK;	712	PUTBACK;
532	PL_op = (OP *)&myop;	713	PL_op = (OP *)&myop;
533	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	714	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
534	SPAGAIN;	715	SPAGAIN;
535	}	716	}
536		717
537	ENTER; /* necessary e.g. for dounwind */	718	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
538	}	719	}
539		720
540	static void	721	static void
		722	coro_destroy (pTHX_ struct coro *coro)
		723	{
		724	if (!IN_DESTRUCT)
		725	{
		726	/* restore all saved variables and stuff */
		727	LEAVE_SCOPE (0);
		728	assert (PL_tmps_floor == -1);
		729
		730	/* free all temporaries */
		731	FREETMPS;
		732	assert (PL_tmps_ix == -1);
		733
		734	/* unwind all extra stacks */
		735	POPSTACK_TO (PL_mainstack);
		736
		737	/* unwind main stack */
		738	dounwind (-1);
		739	}
		740
		741	SvREFCNT_dec (GvSV (PL_defgv));
		742	SvREFCNT_dec (GvAV (PL_defgv));
		743	SvREFCNT_dec (GvSV (PL_errgv));
		744	SvREFCNT_dec (PL_defoutgv);
		745	SvREFCNT_dec (PL_rs);
		746	SvREFCNT_dec (GvSV (irsgv));
		747
		748	SvREFCNT_dec (PL_diehook);
		749	SvREFCNT_dec (PL_warnhook);
		750
		751	SvREFCNT_dec (coro->saved_deffh);
		752	SvREFCNT_dec (coro->throw);
		753
		754	coro_destroy_stacks (aTHX);
		755	}
		756
		757	static void
541	free_coro_mortal ()	758	free_coro_mortal (pTHX)
542	{	759	{
543	if (coro_mortal)	760	if (expect_true (coro_mortal))
544	{	761	{
545	SvREFCNT_dec (coro_mortal);	762	SvREFCNT_dec (coro_mortal);
546	coro_mortal = 0;	763	coro_mortal = 0;
547	}	764	}
548	}	765	}
549		766
		767	static int
		768	runops_trace (pTHX)
		769	{
		770	COP *oldcop = 0;
		771	int oldcxix = -2;
		772	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		773	coro_cctx *cctx = coro->cctx;
		774
		775	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		776	{
		777	PERL_ASYNC_CHECK ();
		778
		779	if (cctx->flags & CC_TRACE_ALL)
		780	{
		781	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		782	{
		783	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		784	SV **bot, **top;
		785	AV *av = newAV (); /* return values */
		786	SV **cb;
		787	dSP;
		788
		789	GV *gv = CvGV (cx->blk_sub.cv);
		790	SV *fullname = sv_2mortal (newSV (0));
		791	if (isGV (gv))
		792	gv_efullname3 (fullname, gv, 0);
		793
		794	bot = PL_stack_base + cx->blk_oldsp + 1;
		795	top = cx->blk_gimme == G_ARRAY ? SP + 1
		796	: cx->blk_gimme == G_SCALAR ? bot + 1
		797	: bot;
		798
		799	av_extend (av, top - bot);
		800	while (bot < top)
		801	av_push (av, SvREFCNT_inc (*bot++));
		802
		803	PL_runops = RUNOPS_DEFAULT;
		804	ENTER;
		805	SAVETMPS;
		806	EXTEND (SP, 3);
		807	PUSHMARK (SP);
		808	PUSHs (&PL_sv_no);
		809	PUSHs (fullname);
		810	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		811	PUTBACK;
		812	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		813	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		814	SPAGAIN;
		815	FREETMPS;
		816	LEAVE;
		817	PL_runops = runops_trace;
		818	}
		819
		820	if (oldcop != PL_curcop)
		821	{
		822	oldcop = PL_curcop;
		823
		824	if (PL_curcop != &PL_compiling)
		825	{
		826	SV **cb;
		827
		828	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		829	{
		830	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		831
		832	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		833	{
		834	runops_proc_t old_runops = PL_runops;
		835	dSP;
		836	GV *gv = CvGV (cx->blk_sub.cv);
		837	SV *fullname = sv_2mortal (newSV (0));
		838
		839	if (isGV (gv))
		840	gv_efullname3 (fullname, gv, 0);
		841
		842	PL_runops = RUNOPS_DEFAULT;
		843	ENTER;
		844	SAVETMPS;
		845	EXTEND (SP, 3);
		846	PUSHMARK (SP);
		847	PUSHs (&PL_sv_yes);
		848	PUSHs (fullname);
		849	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		850	PUTBACK;
		851	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		852	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		853	SPAGAIN;
		854	FREETMPS;
		855	LEAVE;
		856	PL_runops = runops_trace;
		857	}
		858
		859	oldcxix = cxstack_ix;
		860	}
		861
		862	if (cctx->flags & CC_TRACE_LINE)
		863	{
		864	dSP;
		865
		866	PL_runops = RUNOPS_DEFAULT;
		867	ENTER;
		868	SAVETMPS;
		869	EXTEND (SP, 3);
		870	PL_runops = RUNOPS_DEFAULT;
		871	PUSHMARK (SP);
		872	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		873	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		874	PUTBACK;
		875	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		876	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		877	SPAGAIN;
		878	FREETMPS;
		879	LEAVE;
		880	PL_runops = runops_trace;
		881	}
		882	}
		883	}
		884	}
		885	}
		886
		887	TAINT_NOT;
		888	return 0;
		889	}
		890
550	/* inject a fake call to Coro::State::_cctx_init into the execution */	891	/* inject a fake call to Coro::State::_cctx_init into the execution */
		892	/* _cctx_init should be careful, as it could be called at almost any time */
		893	/* during execution of a perl program */
551	static void NOINLINE	894	static void NOINLINE
552	prepare_cctx (coro_cctx *cctx)	895	cctx_prepare (pTHX_ coro_cctx *cctx)
553	{	896	{
554	dSP;	897	dSP;
555	LOGOP myop;	898	LOGOP myop;
		899
		900	PL_top_env = &PL_start_env;
		901
		902	if (cctx->flags & CC_TRACE)
		903	PL_runops = runops_trace;
556		904
557	Zero (&myop, 1, LOGOP);	905	Zero (&myop, 1, LOGOP);
558	myop.op_next = PL_op;	906	myop.op_next = PL_op;
559	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	907	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
560		908
…		…
566	PL_op = (OP *)&myop;	914	PL_op = (OP *)&myop;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	915	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	916	SPAGAIN;
569	}	917	}
570		918
		919	/*
		920	* this is a _very_ stripped down perl interpreter ;)
		921	*/
571	static void	922	static void
572	coro_run (void *arg)	923	cctx_run (void *arg)
573	{	924	{
		925	dTHX;
		926
574	/* coro_run is the alternative tail of transfer(), so unlock here. */	927	/* cctx_run is the alternative tail of transfer(), so unlock here. */
575	UNLOCK;	928	UNLOCK;
576		929
577	/*	930	/* we now skip the entersub that lead to transfer() */
578	* this is a _very_ stripped down perl interpreter ;)	931	PL_op = PL_op->op_next;
579	*/
580	PL_top_env = &PL_start_env;
581		932
582	/* inject call to cctx_init */	933	/* inject a fake subroutine call to cctx_init */
583	prepare_cctx ((coro_cctx *)arg);	934	cctx_prepare (aTHX_ (coro_cctx *)arg);
584		935
585	/* somebody will hit me for both perl_run and PL_restartop */	936	/* somebody or something will hit me for both perl_run and PL_restartop */
586	PL_restartop = PL_op;	937	PL_restartop = PL_op;
587	perl_run (PL_curinterp);	938	perl_run (PL_curinterp);
588		939
589	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	940	/*
590	abort ();	941	* If perl-run returns we assume exit() was being called or the coro
		942	* fell off the end, which seems to be the only valid (non-bug)
		943	* reason for perl_run to return. We try to exit by jumping to the
		944	* bootstrap-time "top" top_env, as we cannot restore the "main"
		945	* coroutine as Coro has no such concept
		946	*/
		947	PL_top_env = main_top_env;
		948	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
591	}	949	}
592		950
593	static coro_cctx *	951	static coro_cctx *
594	cctx_new ()	952	cctx_new ()
595	{	953	{
596	coro_cctx *cctx;	954	coro_cctx *cctx;
		955	void *stack_start;
		956	size_t stack_size;
597		957
598	++cctx_count;	958	++cctx_count;
599		959
600	Newz (0, cctx, 1, coro_cctx);	960	Newz (0, cctx, 1, coro_cctx);
601		961
602	#if HAVE_MMAP	962	#if HAVE_MMAP
603
604	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	963	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
605	/* mmap supposedly does allocate-on-write for us */	964	/* mmap supposedly does allocate-on-write for us */
606	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	965	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
607		966
608	if (cctx->sptr == (void *)-1)	967	if (cctx->sptr != (void *)-1)
609	{
610	perror ("FATAL: unable to mmap stack for coroutine");
611	_exit (EXIT_FAILURE);
612	}	968	{
613
614	# if STACKGUARD	969	# if CORO_STACKGUARD
615	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	970	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
616	# endif	971	# endif
		972	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		973	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		974	cctx->flags |= CC_MAPPED;
		975	}
		976	else
		977	#endif
		978	{
		979	cctx->ssize = coro_stacksize * (long)sizeof (long);
		980	New (0, cctx->sptr, coro_stacksize, long);
617		981
618	#else
619
620	cctx->ssize = STACKSIZE * (long)sizeof (long);
621	New (0, cctx->sptr, STACKSIZE, long);
622
623	if (!cctx->sptr)	982	if (!cctx->sptr)
624	{	983	{
625	perror ("FATAL: unable to malloc stack for coroutine");	984	perror ("FATAL: unable to allocate stack for coroutine");
626	_exit (EXIT_FAILURE);	985	_exit (EXIT_FAILURE);
627	}	986	}
628		987
629	#endif	988	stack_start = cctx->sptr;
		989	stack_size = cctx->ssize;
		990	}
630		991
631	#if USE_VALGRIND	992	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
632	cctx->valgrind_id = VALGRIND_STACK_REGISTER (	993	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
633	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
634	cctx->ssize + (char *)cctx->sptr
635	);
636	#endif
637
638	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
639		994
640	return cctx;	995	return cctx;
641	}	996	}
642		997
643	static void	998	static void
…		…
646	if (!cctx)	1001	if (!cctx)
647	return;	1002	return;
648		1003
649	--cctx_count;	1004	--cctx_count;
650		1005
651	#if USE_VALGRIND	1006	#if CORO_USE_VALGRIND
652	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1007	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
653	#endif	1008	#endif
654		1009
655	#if HAVE_MMAP	1010	#if HAVE_MMAP
		1011	if (cctx->flags & CC_MAPPED)
656	munmap (cctx->sptr, cctx->ssize);	1012	munmap (cctx->sptr, cctx->ssize);
657	#else	1013	else
		1014	#endif
658	Safefree (cctx->sptr);	1015	Safefree (cctx->sptr);
659	#endif
660		1016
661	Safefree (cctx);	1017	Safefree (cctx);
662	}	1018	}
663		1019
		1020	/* wether this cctx should be destructed */
		1021	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1022
664	static coro_cctx *	1023	static coro_cctx *
665	cctx_get ()	1024	cctx_get (pTHX)
666	{	1025	{
667	coro_cctx *cctx;	1026	while (expect_true (cctx_first))
668
669	if (cctx_first)
670	{	1027	{
671	cctx = cctx_first;	1028	coro_cctx *cctx = cctx_first;
672	cctx_first = cctx->next;	1029	cctx_first = cctx->next;
673	--cctx_idle;	1030	--cctx_idle;
674	}	1031
675	else	1032	if (expect_true (!CCTX_EXPIRED (cctx)))
676	{	1033	return cctx;
677	cctx = cctx_new ();	1034
678	PL_op = PL_op->op_next;	1035	cctx_destroy (cctx);
679	}	1036	}
680		1037
681	return cctx;	1038	return cctx_new ();
682	}	1039	}
683		1040
684	static void	1041	static void
685	cctx_put (coro_cctx *cctx)	1042	cctx_put (coro_cctx *cctx)
686	{	1043	{
687	/* free another cctx if overlimit */	1044	/* free another cctx if overlimit */
688	if (cctx_idle >= MAX_IDLE_CCTX)	1045	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
689	{	1046	{
690	coro_cctx *first = cctx_first;	1047	coro_cctx *first = cctx_first;
691	cctx_first = first->next;	1048	cctx_first = first->next;
692	--cctx_idle;	1049	--cctx_idle;
693		1050
694	assert (!first->inuse);
695	cctx_destroy (first);	1051	cctx_destroy (first);
696	}	1052	}
697		1053
698	++cctx_idle;	1054	++cctx_idle;
699	cctx->next = cctx_first;	1055	cctx->next = cctx_first;
700	cctx_first = cctx;	1056	cctx_first = cctx;
701	}	1057	}
702		1058
703	/* never call directly, always through the coro_state_transfer global variable */	1059	/** coroutine switching *****************************************************/
		1060
		1061	static void
		1062	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1063	{
		1064	if (expect_true (prev != next))
		1065	{
		1066	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1067	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1068
		1069	if (expect_false (next->flags & CF_RUNNING))
		1070	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1071
		1072	if (expect_false (next->flags & CF_DESTROYED))
		1073	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1074
		1075	if (
		1076	#if PERL_VERSION_ATLEAST (5,9,0)
		1077	expect_false (PL_parser)
		1078	#else
		1079	expect_false (PL_lex_state != LEX_NOTPARSING)
		1080	#endif
		1081	)
		1082	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1083	}
		1084	}
		1085
		1086	/* always use the TRANSFER macro */
704	static void NOINLINE	1087	static void NOINLINE
705	transfer (struct coro *prev, struct coro *next)	1088	transfer (pTHX_ struct coro *prev, struct coro *next)
706	{	1089	{
707	dSTACKLEVEL;	1090	dSTACKLEVEL;
708		1091
709	/* sometimes transfer is only called to set idle_sp */	1092	/* sometimes transfer is only called to set idle_sp */
710	if (!next)	1093	if (expect_false (!next))
711	{	1094	{
712	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1095	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
713	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */	1096	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
714	}	1097	}
715	else if (prev != next)	1098	else if (expect_true (prev != next))
716	{	1099	{
717	coro_cctx *prev__cctx;	1100	coro_cctx *prev__cctx;
718		1101
719	if (prev->flags & CF_NEW)	1102	if (expect_false (prev->flags & CF_NEW))
720	{	1103	{
721	/* create a new empty context */	1104	/* create a new empty context */
722	Newz (0, prev->cctx, 1, coro_cctx);	1105	Newz (0, prev->cctx, 1, coro_cctx);
723	prev->cctx->inuse = 1;
724	prev->flags &= ~CF_NEW;	1106	prev->flags &= ~CF_NEW;
725	prev->flags |= CF_RUNNING;	1107	prev->flags |= CF_RUNNING;
726	}	1108	}
727		1109
728	/*TODO: must not croak here */
729	if (!prev->flags & CF_RUNNING)
730	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
731
732	if (next->flags & CF_RUNNING)
733	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
734
735	prev->flags &= ~CF_RUNNING;	1110	prev->flags &= ~CF_RUNNING;
736	next->flags |= CF_RUNNING;	1111	next->flags |= CF_RUNNING;
737		1112
738	LOCK;	1113	LOCK;
739		1114
740	if (next->flags & CF_NEW)	1115	if (expect_false (next->flags & CF_NEW))
741	{	1116	{
742	/* need to start coroutine */	1117	/* need to start coroutine */
743	next->flags &= ~CF_NEW;	1118	next->flags &= ~CF_NEW;
744	/* first get rid of the old state */	1119	/* first get rid of the old state */
745	save_perl (prev);	1120	save_perl (aTHX_ prev);
746	/* setup coroutine call */	1121	/* setup coroutine call */
747	setup_coro (next);	1122	coro_setup (aTHX_ next);
748	/* need a new stack */
749	assert (!next->cctx);
750	}	1123	}
751	else	1124	else
752	{	1125	{
753	/* coroutine already started */	1126	/* coroutine already started */
754	save_perl (prev);	1127	save_perl (aTHX_ prev);
755	load_perl (next);	1128	load_perl (aTHX_ next);
756	}	1129	}
757		1130
758	prev__cctx = prev->cctx;	1131	prev__cctx = prev->cctx;
759		1132
760	/* possibly "free" the cctx */	1133	/* possibly "free" the cctx */
761	if (prev__cctx->idle_sp == STACKLEVEL)	1134	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
762	{	1135	{
763	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1136	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
764	assert (PL_top_env == prev__cctx->top_env);	1137	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
765		1138
766	prev->cctx = 0;	1139	prev->cctx = 0;
767		1140
		1141	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1142	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1143	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1144	if (!next->cctx)
		1145	next->cctx = cctx_get (aTHX);
		1146
768	cctx_put (prev__cctx);	1147	cctx_put (prev__cctx);
769	prev__cctx->inuse = 0;
770	}	1148	}
771		1149
		1150	++next->usecount;
		1151
772	if (!next->cctx)	1152	if (expect_true (!next->cctx))
773	{
774	next->cctx = cctx_get ();	1153	next->cctx = cctx_get (aTHX);
775	assert (!next->cctx->inuse);
776	next->cctx->inuse = 1;
777	}
778		1154
779	if (prev__cctx != next->cctx)	1155	if (expect_false (prev__cctx != next->cctx))
780	{	1156	{
781	prev__cctx->top_env = PL_top_env;	1157	prev__cctx->top_env = PL_top_env;
782	PL_top_env = next->cctx->top_env;	1158	PL_top_env = next->cctx->top_env;
783	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1159	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
784	}	1160	}
785		1161
786	free_coro_mortal ();	1162	free_coro_mortal (aTHX);
787
788	UNLOCK;	1163	UNLOCK;
		1164
		1165	if (expect_false (prev->throw || next->throw))
		1166	{
		1167	struct coro *coro = SvSTATE (coro_current);
		1168
		1169	if (coro->throw)
		1170	{
		1171	SV *exception = coro->throw;
		1172	coro->throw = 0;
		1173	sv_setsv (ERRSV, exception);
		1174	croak (0);
		1175	}
		1176	}
789	}	1177	}
790	}	1178	}
791		1179
792	struct transfer_args	1180	struct transfer_args
793	{	1181	{
794	struct coro *prev, *next;	1182	struct coro *prev, *next;
795	};	1183	};
796		1184
797	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1185	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1186	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
798		1187
		1188	/** high level stuff ********************************************************/
		1189
799	static void	1190	static int
800	coro_state_destroy (struct coro *coro)	1191	coro_state_destroy (pTHX_ struct coro *coro)
801	{	1192	{
802	if (coro->refcnt--)	1193	if (coro->flags & CF_DESTROYED)
803	return;	1194	return 0;
		1195
		1196	coro->flags |= CF_DESTROYED;
		1197
		1198	if (coro->flags & CF_READY)
		1199	{
		1200	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1201	/* alternative: look through all ready queues and remove the coro */
		1202	LOCK;
		1203	--coro_nready;
		1204	UNLOCK;
		1205	}
		1206	else
		1207	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
804		1208
805	if (coro->mainstack && coro->mainstack != main_mainstack)	1209	if (coro->mainstack && coro->mainstack != main_mainstack)
806	{	1210	{
807	struct coro temp;	1211	struct coro temp;
808	Zero (&temp, 1, struct coro);
809	temp.save = CORO_SAVE_ALL;
810		1212
811	if (coro->flags & CF_RUNNING)	1213	if (coro->flags & CF_RUNNING)
812	croak ("FATAL: tried to destroy currently running coroutine");	1214	croak ("FATAL: tried to destroy currently running coroutine");
813		1215
814	save_perl (&temp);	1216	save_perl (aTHX_ &temp);
815	load_perl (coro);	1217	load_perl (aTHX_ coro);
816		1218
817	coro_destroy_stacks ();	1219	coro_destroy (aTHX_ coro);
818		1220
819	load_perl (&temp); /* this will get rid of defsv etc.. */	1221	load_perl (aTHX_ &temp);
820		1222
821	coro->mainstack = 0;	1223	coro->slot = 0;
822	}	1224	}
823		1225
824	cctx_destroy (coro->cctx);	1226	cctx_destroy (coro->cctx);
825	SvREFCNT_dec (coro->args);	1227	SvREFCNT_dec (coro->args);
826	Safefree (coro);	1228
		1229	if (coro->next) coro->next->prev = coro->prev;
		1230	if (coro->prev) coro->prev->next = coro->next;
		1231	if (coro == coro_first) coro_first = coro->next;
		1232
		1233	return 1;
827	}	1234	}
828		1235
829	static int	1236	static int
830	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1237	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
831	{	1238	{
832	struct coro *coro = (struct coro *)mg->mg_ptr;	1239	struct coro *coro = (struct coro *)mg->mg_ptr;
833	mg->mg_ptr = 0;	1240	mg->mg_ptr = 0;
834		1241
		1242	coro->hv = 0;
		1243
		1244	if (--coro->refcnt < 0)
		1245	{
835	coro_state_destroy (coro);	1246	coro_state_destroy (aTHX_ coro);
		1247	Safefree (coro);
		1248	}
836		1249
837	return 0;	1250	return 0;
838	}	1251	}
839		1252
840	static int	1253	static int
…		…
847	return 0;	1260	return 0;
848	}	1261	}
849		1262
850	static MGVTBL coro_state_vtbl = {	1263	static MGVTBL coro_state_vtbl = {
851	0, 0, 0, 0,	1264	0, 0, 0, 0,
852	coro_state_clear,	1265	coro_state_free,
853	0,	1266	0,
854	#ifdef MGf_DUP	1267	#ifdef MGf_DUP
855	coro_state_dup,	1268	coro_state_dup,
856	#else	1269	#else
857	# define MGf_DUP 0	1270	# define MGf_DUP 0
858	#endif	1271	#endif
859	};	1272	};
860		1273
861	static struct coro *
862	SvSTATE (SV *coro)
863	{
864	HV *stash;
865	MAGIC *mg;
866
867	if (SvROK (coro))
868	coro = SvRV (coro);
869
870	stash = SvSTASH (coro);
871	if (stash != coro_stash && stash != coro_state_stash)
872	{
873	/* very slow, but rare, check */
874	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
875	croak ("Coro::State object required");
876	}
877
878	mg = SvMAGIC (coro);
879	assert (mg->mg_type == PERL_MAGIC_ext);
880	return (struct coro *)mg->mg_ptr;
881	}
882
883	static void	1274	static void
884	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1275	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
885	{	1276	{
886	ta->prev = SvSTATE (prev_sv);	1277	ta->prev = SvSTATE (prev_sv);
887	ta->next = SvSTATE (next_sv);	1278	ta->next = SvSTATE (next_sv);
		1279	TRANSFER_CHECK (*ta);
888	}	1280	}
889		1281
890	static void	1282	static void
891	api_transfer (SV *prev_sv, SV *next_sv)	1283	api_transfer (SV *prev_sv, SV *next_sv)
892	{	1284	{
		1285	dTHX;
893	struct transfer_args ta;	1286	struct transfer_args ta;
894		1287
895	prepare_transfer (&ta, prev_sv, next_sv);	1288	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
896	TRANSFER (ta);	1289	TRANSFER (ta);
897	}	1290	}
898		1291
899	static int
900	api_save (SV *coro_sv, int new_save)
901	{
902	struct coro *coro = SvSTATE (coro_sv);
903	int old_save = coro->save;
904
905	if (new_save >= 0)
906	coro->save = new_save;
907
908	return old_save;
909	}
910
911	/** Coro ********************************************************************/	1292	/** Coro ********************************************************************/
912		1293
913	#define PRIO_MAX 3
914	#define PRIO_HIGH 1
915	#define PRIO_NORMAL 0
916	#define PRIO_LOW -1
917	#define PRIO_IDLE -3
918	#define PRIO_MIN -4
919
920	/* for Coro.pm */
921	static SV *coro_current;
922	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
923	static int coro_nready;
924
925	static void	1294	static void
926	coro_enq (SV *coro_sv)	1295	coro_enq (pTHX_ SV *coro_sv)
927	{	1296	{
928	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1297	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
929	coro_nready++;
930	}	1298	}
931		1299
932	static SV *	1300	static SV *
933	coro_deq (int min_prio)	1301	coro_deq (pTHX_ int min_prio)
934	{	1302	{
935	int prio = PRIO_MAX - PRIO_MIN;	1303	int prio = PRIO_MAX - PRIO_MIN;
936		1304
937	min_prio -= PRIO_MIN;	1305	min_prio -= PRIO_MIN;
938	if (min_prio < 0)	1306	if (min_prio < 0)
939	min_prio = 0;	1307	min_prio = 0;
940		1308
941	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1309	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
942	if (AvFILLp (coro_ready [prio]) >= 0)	1310	if (AvFILLp (coro_ready [prio]) >= 0)
943	{
944	coro_nready--;
945	return av_shift (coro_ready [prio]);	1311	return av_shift (coro_ready [prio]);
946	}
947		1312
948	return 0;	1313	return 0;
949	}	1314	}
950		1315
951	static int	1316	static int
952	api_ready (SV *coro_sv)	1317	api_ready (SV *coro_sv)
953	{	1318	{
		1319	dTHX;
954	struct coro *coro;	1320	struct coro *coro;
955		1321
956	if (SvROK (coro_sv))	1322	if (SvROK (coro_sv))
957	coro_sv = SvRV (coro_sv);	1323	coro_sv = SvRV (coro_sv);
958		1324
…		…
962	return 0;	1328	return 0;
963		1329
964	coro->flags |= CF_READY;	1330	coro->flags |= CF_READY;
965		1331
966	LOCK;	1332	LOCK;
967	coro_enq (SvREFCNT_inc (coro_sv));	1333	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1334	++coro_nready;
968	UNLOCK;	1335	UNLOCK;
969		1336
970	return 1;	1337	return 1;
971	}	1338	}
972		1339
973	static int	1340	static int
974	api_is_ready (SV *coro_sv)	1341	api_is_ready (SV *coro_sv)
975	{	1342	{
		1343	dTHX;
976	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1344	return !!(SvSTATE (coro_sv)->flags & CF_READY);
977	}	1345	}
978		1346
979	static void	1347	static void
980	prepare_schedule (struct transfer_args *ta)	1348	prepare_schedule (pTHX_ struct transfer_args *ta)
981	{	1349	{
982	SV *prev, *next;	1350	SV *prev_sv, *next_sv;
983		1351
984	for (;;)	1352	for (;;)
985	{	1353	{
986	LOCK;	1354	LOCK;
987	next = coro_deq (PRIO_MIN);	1355	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1356
		1357	/* nothing to schedule: call the idle handler */
		1358	if (expect_false (!next_sv))
		1359	{
		1360	dSP;
		1361	UNLOCK;
		1362
		1363	ENTER;
		1364	SAVETMPS;
		1365
		1366	PUSHMARK (SP);
		1367	PUTBACK;
		1368	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1369
		1370	FREETMPS;
		1371	LEAVE;
		1372	continue;
		1373	}
		1374
		1375	ta->next = SvSTATE (next_sv);
		1376
		1377	/* cannot transfer to destroyed coros, skip and look for next */
		1378	if (expect_false (ta->next->flags & CF_DESTROYED))
		1379	{
		1380	UNLOCK;
		1381	SvREFCNT_dec (next_sv);
		1382	/* coro_nready is already taken care of by destroy */
		1383	continue;
		1384	}
		1385
		1386	--coro_nready;
988	UNLOCK;	1387	UNLOCK;
989
990	if (next)
991	break;	1388	break;
992
993	{
994	dSP;
995
996	ENTER;
997	SAVETMPS;
998
999	PUSHMARK (SP);
1000	PUTBACK;
1001	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1002
1003	FREETMPS;
1004	LEAVE;
1005	}	1389	}
1006	}
1007
1008	prev = SvRV (coro_current);
1009	SvRV_set (coro_current, next);
1010		1390
1011	/* free this only after the transfer */	1391	/* free this only after the transfer */
1012	LOCK;	1392	prev_sv = SvRV (coro_current);
1013	free_coro_mortal ();
1014	UNLOCK;
1015	coro_mortal = prev;
1016
1017	assert (!SvROK(prev));//D
1018	assert (!SvROK(next));//D
1019
1020	ta->prev = SvSTATE (prev);	1393	ta->prev = SvSTATE (prev_sv);
1021	ta->next = SvSTATE (next);	1394	TRANSFER_CHECK (*ta);
1022
1023	assert (ta->next->flags & CF_READY);	1395	assert (ta->next->flags & CF_READY);
1024	ta->next->flags &= ~CF_READY;	1396	ta->next->flags &= ~CF_READY;
1025	}	1397	SvRV_set (coro_current, next_sv);
1026		1398
		1399	LOCK;
		1400	free_coro_mortal (aTHX);
		1401	coro_mortal = prev_sv;
		1402	UNLOCK;
		1403	}
		1404
1027	static void	1405	static void
1028	prepare_cede (struct transfer_args *ta)	1406	prepare_cede (pTHX_ struct transfer_args *ta)
1029	{	1407	{
1030	api_ready (coro_current);	1408	api_ready (coro_current);
1031	prepare_schedule (ta);	1409	prepare_schedule (aTHX_ ta);
1032	}	1410	}
1033		1411
1034	static int	1412	static int
1035	prepare_cede_notself (struct transfer_args *ta)	1413	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1036	{	1414	{
1037	if (coro_nready)	1415	if (coro_nready)
1038	{	1416	{
1039	SV *prev = SvRV (coro_current);	1417	SV *prev = SvRV (coro_current);
1040	prepare_schedule (ta);	1418	prepare_schedule (aTHX_ ta);
1041	api_ready (prev);	1419	api_ready (prev);
1042	return 1;	1420	return 1;
1043	}	1421	}
1044	else	1422	else
1045	return 0;	1423	return 0;
1046	}	1424	}
1047		1425
1048	static void	1426	static void
1049	api_schedule (void)	1427	api_schedule (void)
1050	{	1428	{
		1429	dTHX;
1051	struct transfer_args ta;	1430	struct transfer_args ta;
1052		1431
1053	prepare_schedule (&ta);	1432	prepare_schedule (aTHX_ &ta);
1054	TRANSFER (ta);	1433	TRANSFER (ta);
1055	}	1434	}
1056		1435
1057	static int	1436	static int
1058	api_cede (void)	1437	api_cede (void)
1059	{	1438	{
		1439	dTHX;
1060	struct transfer_args ta;	1440	struct transfer_args ta;
1061		1441
1062	prepare_cede (&ta);	1442	prepare_cede (aTHX_ &ta);
1063		1443
1064	if (ta.prev != ta.next)	1444	if (expect_true (ta.prev != ta.next))
1065	{	1445	{
1066	TRANSFER (ta);	1446	TRANSFER (ta);
1067	return 1;	1447	return 1;
1068	}	1448	}
1069	else	1449	else
…		…
1071	}	1451	}
1072		1452
1073	static int	1453	static int
1074	api_cede_notself (void)	1454	api_cede_notself (void)
1075	{	1455	{
		1456	dTHX;
1076	struct transfer_args ta;	1457	struct transfer_args ta;
1077		1458
1078	if (prepare_cede_notself (&ta))	1459	if (prepare_cede_notself (aTHX_ &ta))
1079	{	1460	{
1080	TRANSFER (ta);	1461	TRANSFER (ta);
1081	return 1;	1462	return 1;
1082	}	1463	}
1083	else	1464	else
1084	return 0;	1465	return 0;
1085	}	1466	}
1086		1467
		1468	static void
		1469	api_trace (SV *coro_sv, int flags)
		1470	{
		1471	dTHX;
		1472	struct coro *coro = SvSTATE (coro_sv);
		1473
		1474	if (flags & CC_TRACE)
		1475	{
		1476	if (!coro->cctx)
		1477	coro->cctx = cctx_new ();
		1478	else if (!(coro->cctx->flags & CC_TRACE))
		1479	croak ("cannot enable tracing on coroutine with custom stack");
		1480
		1481	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1482	}
		1483	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1484	{
		1485	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1486
		1487	if (coro->flags & CF_RUNNING)
		1488	PL_runops = RUNOPS_DEFAULT;
		1489	else
		1490	coro->slot->runops = RUNOPS_DEFAULT;
		1491	}
		1492	}
		1493
1087	MODULE = Coro::State PACKAGE = Coro::State	1494	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1088		1495
1089	PROTOTYPES: DISABLE	1496	PROTOTYPES: DISABLE
1090		1497
1091	BOOT:	1498	BOOT:
1092	{	1499	{
1093	#ifdef USE_ITHREADS	1500	#ifdef USE_ITHREADS
1094	MUTEX_INIT (&coro_mutex);	1501	MUTEX_INIT (&coro_mutex);
1095	#endif	1502	#endif
1096	BOOT_PAGESIZE;	1503	BOOT_PAGESIZE;
1097		1504
		1505	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1506	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1507
		1508	hv_sig = coro_get_hv ("SIG", TRUE);
		1509	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1510	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1511
		1512	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1513	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1514
1098	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1515	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1099		1516
		1517	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1518	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1100	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1101	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1102	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1103	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1104	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1520	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1105		1521
1106	main_mainstack = PL_mainstack;	1522	main_mainstack = PL_mainstack;
		1523	main_top_env = PL_top_env;
		1524
		1525	while (main_top_env->je_prev)
		1526	main_top_env = main_top_env->je_prev;
1107		1527
1108	coroapi.ver = CORO_API_VERSION;	1528	coroapi.ver = CORO_API_VERSION;
1109	coroapi.transfer = api_transfer;	1529	coroapi.transfer = api_transfer;
1110		1530
1111	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1531	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1118	struct coro *coro;	1538	struct coro *coro;
1119	HV *hv;	1539	HV *hv;
1120	int i;	1540	int i;
1121		1541
1122	Newz (0, coro, 1, struct coro);	1542	Newz (0, coro, 1, struct coro);
1123	coro->args = newAV ();	1543	coro->args = newAV ();
1124	coro->save = CORO_SAVE_ALL;
1125	coro->flags = CF_NEW;	1544	coro->flags = CF_NEW;
1126		1545
		1546	if (coro_first) coro_first->prev = coro;
		1547	coro->next = coro_first;
		1548	coro_first = coro;
		1549
1127	hv = newHV ();	1550	coro->hv = hv = newHV ();
1128	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1551	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1129	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1552	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1130		1553
		1554	av_extend (coro->args, items - 1);
1131	for (i = 1; i < items; i++)	1555	for (i = 1; i < items; i++)
1132	av_push (coro->args, newSVsv (ST (i)));	1556	av_push (coro->args, newSVsv (ST (i)));
1133	}	1557	}
1134	OUTPUT:	1558	OUTPUT:
1135	RETVAL	1559	RETVAL
1136		1560
1137	int	1561	# these not obviously related functions are all rolled into the same xs
1138	save (SV *coro, int new_save = -1)	1562	# function to increase chances that they all will call transfer with the same
1139	CODE:	1563	# stack offset
1140	RETVAL = api_save (coro, new_save);
1141	OUTPUT:
1142	RETVAL
1143
1144	void	1564	void
1145	_set_stacklevel (...)	1565	_set_stacklevel (...)
1146	ALIAS:	1566	ALIAS:
1147	Coro::State::transfer = 1	1567	Coro::State::transfer = 1
1148	Coro::schedule = 2	1568	Coro::schedule = 2
…		…
1161		1581
1162	case 1:	1582	case 1:
1163	if (items != 2)	1583	if (items != 2)
1164	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1584	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1165		1585
1166	prepare_transfer (&ta, ST (0), ST (1));	1586	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1167	break;	1587	break;
1168		1588
1169	case 2:	1589	case 2:
1170	prepare_schedule (&ta);	1590	prepare_schedule (aTHX_ &ta);
1171	break;	1591	break;
1172		1592
1173	case 3:	1593	case 3:
1174	prepare_cede (&ta);	1594	prepare_cede (aTHX_ &ta);
1175	break;	1595	break;
1176		1596
1177	case 4:	1597	case 4:
1178	if (!prepare_cede_notself (&ta))	1598	if (!prepare_cede_notself (aTHX_ &ta))
1179	XSRETURN_EMPTY;	1599	XSRETURN_EMPTY;
1180		1600
1181	break;	1601	break;
1182	}	1602	}
1183		1603
1184	BARRIER;	1604	BARRIER;
1185	TRANSFER (ta);	1605	TRANSFER (ta);
1186	}
1187		1606
1188	void	1607	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1189	_clone_state_from (SV *dst, SV *src)	1608	XSRETURN_YES;
		1609	}
		1610
		1611	bool
		1612	_destroy (SV *coro_sv)
1190	CODE:	1613	CODE:
1191	{	1614	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1192	struct coro *coro_src = SvSTATE (src);	1615	OUTPUT:
1193		1616	RETVAL
1194	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1195
1196	++coro_src->refcnt;
1197	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1198	}
1199		1617
1200	void	1618	void
1201	_exit (code)	1619	_exit (code)
1202	int code	1620	int code
1203	PROTOTYPE: $	1621	PROTOTYPE: $
1204	CODE:	1622	CODE:
1205	_exit (code);	1623	_exit (code);
1206		1624
1207	int	1625	int
		1626	cctx_stacksize (int new_stacksize = 0)
		1627	CODE:
		1628	RETVAL = coro_stacksize;
		1629	if (new_stacksize)
		1630	coro_stacksize = new_stacksize;
		1631	OUTPUT:
		1632	RETVAL
		1633
		1634	int
1208	cctx_count ()	1635	cctx_count ()
1209	CODE:	1636	CODE:
1210	RETVAL = cctx_count;	1637	RETVAL = cctx_count;
1211	OUTPUT:	1638	OUTPUT:
1212	RETVAL	1639	RETVAL
…		…
1216	CODE:	1643	CODE:
1217	RETVAL = cctx_idle;	1644	RETVAL = cctx_idle;
1218	OUTPUT:	1645	OUTPUT:
1219	RETVAL	1646	RETVAL
1220		1647
		1648	void
		1649	list ()
		1650	PPCODE:
		1651	{
		1652	struct coro *coro;
		1653	for (coro = coro_first; coro; coro = coro->next)
		1654	if (coro->hv)
		1655	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1656	}
		1657
		1658	void
		1659	call (Coro::State coro, SV *coderef)
		1660	ALIAS:
		1661	eval = 1
		1662	CODE:
		1663	{
		1664	if (coro->mainstack)
		1665	{
		1666	struct coro temp;
		1667
		1668	if (!(coro->flags & CF_RUNNING))
		1669	{
		1670	save_perl (aTHX_ &temp);
		1671	load_perl (aTHX_ coro);
		1672	}
		1673
		1674	{
		1675	dSP;
		1676	ENTER;
		1677	SAVETMPS;
		1678	PUSHMARK (SP);
		1679	PUTBACK;
		1680
		1681	if (ix)
		1682	eval_sv (coderef, 0);
		1683	else
		1684	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1685
		1686	SPAGAIN;
		1687	FREETMPS;
		1688	LEAVE;
		1689	PUTBACK;
		1690	}
		1691
		1692	if (!(coro->flags & CF_RUNNING))
		1693	{
		1694	save_perl (aTHX_ coro);
		1695	load_perl (aTHX_ &temp);
		1696	}
		1697	}
		1698	}
		1699
		1700	SV *
		1701	is_ready (Coro::State coro)
		1702	PROTOTYPE: $
		1703	ALIAS:
		1704	is_ready = CF_READY
		1705	is_running = CF_RUNNING
		1706	is_new = CF_NEW
		1707	is_destroyed = CF_DESTROYED
		1708	CODE:
		1709	RETVAL = boolSV (coro->flags & ix);
		1710	OUTPUT:
		1711	RETVAL
		1712
		1713	void
		1714	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1715
		1716	SV *
		1717	has_stack (Coro::State coro)
		1718	PROTOTYPE: $
		1719	CODE:
		1720	RETVAL = boolSV (!!coro->cctx);
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	int
		1725	is_traced (Coro::State coro)
		1726	PROTOTYPE: $
		1727	CODE:
		1728	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	IV
		1733	rss (Coro::State coro)
		1734	PROTOTYPE: $
		1735	ALIAS:
		1736	usecount = 1
		1737	CODE:
		1738	switch (ix)
		1739	{
		1740	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1741	case 1: RETVAL = coro->usecount; break;
		1742	}
		1743	OUTPUT:
		1744	RETVAL
		1745
		1746
1221	MODULE = Coro::State PACKAGE = Coro	1747	MODULE = Coro::State PACKAGE = Coro
1222		1748
1223	BOOT:	1749	BOOT:
1224	{	1750	{
1225	int i;	1751	int i;
1226		1752
		1753	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1754	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1755	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1756
		1757	coro_current = coro_get_sv ("Coro::current", FALSE);
		1758	SvREADONLY_on (coro_current);
		1759
1227	coro_stash = gv_stashpv ("Coro", TRUE);	1760	coro_stash = gv_stashpv ("Coro", TRUE);
1228		1761
1229	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1762	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1230	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1763	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1231	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1764	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1232	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1765	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1233	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1766	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1234	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1767	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1235		1768
1236	coro_current = get_sv ("Coro::current", FALSE);
1237	SvREADONLY_on (coro_current);
1238
1239	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1769	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1240	coro_ready[i] = newAV ();	1770	coro_ready[i] = newAV ();
1241		1771
1242	{	1772	{
1243	SV *sv = perl_get_sv("Coro::API", 1);	1773	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1774	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1244		1775
1245	coroapi.schedule = api_schedule;	1776	coroapi.schedule = api_schedule;
1246	coroapi.save = api_save;
1247	coroapi.cede = api_cede;	1777	coroapi.cede = api_cede;
1248	coroapi.cede_notself = api_cede_notself;	1778	coroapi.cede_notself = api_cede_notself;
1249	coroapi.ready = api_ready;	1779	coroapi.ready = api_ready;
1250	coroapi.is_ready = api_is_ready;	1780	coroapi.is_ready = api_is_ready;
1251	coroapi.nready = &coro_nready;	1781	coroapi.nready = &coro_nready;
…		…
1292	CODE:	1822	CODE:
1293	RETVAL = boolSV (api_ready (self));	1823	RETVAL = boolSV (api_ready (self));
1294	OUTPUT:	1824	OUTPUT:
1295	RETVAL	1825	RETVAL
1296		1826
1297	SV *
1298	is_ready (SV *self)
1299	PROTOTYPE: $
1300	CODE:
1301	RETVAL = boolSV (api_is_ready (self));
1302	OUTPUT:
1303	RETVAL
1304
1305	int	1827	int
1306	nready (...)	1828	nready (...)
1307	PROTOTYPE:	1829	PROTOTYPE:
1308	CODE:	1830	CODE:
1309	RETVAL = coro_nready;	1831	RETVAL = coro_nready;
1310	OUTPUT:	1832	OUTPUT:
1311	RETVAL	1833	RETVAL
1312		1834
		1835	void
		1836	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1837	PROTOTYPE: $;$
		1838	CODE:
		1839	SvREFCNT_dec (self->throw);
		1840	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1841
		1842	# for async_pool speedup
		1843	void
		1844	_pool_1 (SV *cb)
		1845	CODE:
		1846	{
		1847	struct coro *coro = SvSTATE (coro_current);
		1848	HV *hv = (HV *)SvRV (coro_current);
		1849	AV *defav = GvAV (PL_defgv);
		1850	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1851	AV *invoke_av;
		1852	int i, len;
		1853
		1854	if (!invoke)
		1855	croak ("\3async_pool terminate\2\n");
		1856
		1857	SvREFCNT_dec (coro->saved_deffh);
		1858	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1859
		1860	hv_store (hv, "desc", sizeof ("desc") - 1,
		1861	newSVpvn (strpair ("[async_pool]")), 0);
		1862
		1863	invoke_av = (AV *)SvRV (invoke);
		1864	len = av_len (invoke_av);
		1865
		1866	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1867
		1868	if (len > 0)
		1869	{
		1870	av_fill (defav, len - 1);
		1871	for (i = 0; i < len; ++i)
		1872	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1873	}
		1874
		1875	SvREFCNT_dec (invoke);
		1876	}
		1877
		1878	void
		1879	_pool_2 (SV *cb)
		1880	CODE:
		1881	{
		1882	struct coro *coro = SvSTATE (coro_current);
		1883
		1884	sv_setsv (cb, &PL_sv_undef);
		1885
		1886	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1887	coro->saved_deffh = 0;
		1888
		1889	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1890	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1891	croak ("\3async_pool terminate\2\n");
		1892
		1893	av_clear (GvAV (PL_defgv));
		1894	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1895	newSVpvn (strpair ("[async_pool idle]")), 0);
		1896
		1897	coro->prio = 0;
		1898
		1899	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1900	api_trace (coro_current, 0);
		1901
		1902	av_push (av_async_pool, newSVsv (coro_current));
		1903	}
		1904
		1905
1313	MODULE = Coro::State PACKAGE = Coro::AIO	1906	MODULE = Coro::State PACKAGE = Coro::AIO
1314		1907
1315	SV *	1908	SV *
1316	_get_state ()	1909	_get_state ()
1317	CODE:	1910	CODE:

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