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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.142 by root, Tue Feb 13 19:21:29 2007 UTC vs.
Revision 1.198 by root, Sun Oct 7 03:58:37 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
…		…
31	#else	34	#else
32	# define PAGESIZE 0	35	# define PAGESIZE 0
33	# define BOOT_PAGESIZE (void)0	36	# define BOOT_PAGESIZE (void)0
34	#endif	37	#endif
35		38
36	#if USE_VALGRIND	39	#if CORO_USE_VALGRIND
37	# include <valgrind/valgrind.h>	40	# include <valgrind/valgrind.h>
38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))	41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
39	#else	42	#else
40	# define REGISTER_STACK(cctx,start,end)	43	# define REGISTER_STACK(cctx,start,end)
41	#endif	44	#endif
…		…
73	/* 5.8.7 */	76	/* 5.8.7 */
74	#ifndef SvRV_set	77	#ifndef SvRV_set
75	# define SvRV_set(s,v) SvRV(s) = (v)	78	# define SvRV_set(s,v) SvRV(s) = (v)
76	#endif	79	#endif
77		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
		88
78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
79	# undef STACKGUARD	90	# undef CORO_STACKGUARD
80	#endif	91	#endif
81		92
82	#ifndef STACKGUARD	93	#ifndef CORO_STACKGUARD
83	# define STACKGUARD 0	94	# define CORO_STACKGUARD 0
84	#endif	95	#endif
85		96
86	/* prefer perl internal functions over our own? */	97	/* prefer perl internal functions over our own? */
87	#ifndef PREFER_PERL_FUNCTIONS	98	#ifndef CORO_PREFER_PERL_FUNCTIONS
88	# define PREFER_PERL_FUNCTIONS 0	99	# define CORO_PREFER_PERL_FUNCTIONS 0
89	#endif	100	#endif
90		101
91	/* The next macro should declare a variable stacklevel that contains and approximation	102	/* The next macros try to return the current stack pointer, in an as
92	* to the current C stack pointer. Its property is that it changes with each call	103	* portable way as possible. */
93	* and should be unique. */
94	#define dSTACKLEVEL int stacklevel	104	#define dSTACKLEVEL volatile char stacklevel
95	#define STACKLEVEL ((void *)&stacklevel)	105	#define STACKLEVEL ((void *)&stacklevel)
96		106
97	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
98		108
99	#if __GNUC__ >= 3	109	#if __GNUC__ >= 3
100	# define attribute(x) __attribute__(x)	110	# define attribute(x) __attribute__(x)
101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
102	#else	113	#else
103	# define attribute(x)	114	# define attribute(x)
104	# define BARRIER	115	# define BARRIER
		116	# define expect(expr,value) (expr)
105	#endif	117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
106		121
107	#define NOINLINE attribute ((noinline))	122	#define NOINLINE attribute ((noinline))
108		123
109	#include "CoroAPI.h"	124	#include "CoroAPI.h"
110		125
…		…
124	I32 laststype;	139	I32 laststype;
125	int laststatval;	140	int laststatval;
126	Stat_t statcache;	141	Stat_t statcache;
127	};	142	};
128		143
		144	static size_t coro_stacksize = CORO_STACKSIZE;
129	static struct CoroAPI coroapi;	145	static struct CoroAPI coroapi;
130	static AV *main_mainstack; /* used to differentiate between $main and others */	146	static AV *main_mainstack; /* used to differentiate between $main and others */
		147	static JMPENV *main_top_env;
131	static HV *coro_state_stash, *coro_stash;	148	static HV *coro_state_stash, *coro_stash;
132	static SV *coro_mortal; /* will be freed after next transfer */	149	static SV *coro_mortal; /* will be freed after next transfer */
133		150
		151	static GV *irsgv; /* $/ */
		152	static GV *stdoutgv; /* *STDOUT */
		153
		154	/* async_pool helper stuff */
		155	static SV *sv_pool_rss;
		156	static SV *sv_pool_size;
		157	static AV *av_async_pool;
		158
134	static struct coro_cctx *cctx_first;	159	static struct coro_cctx *cctx_first;
135	static int cctx_count, cctx_idle;	160	static int cctx_count, cctx_idle;
		161
		162	enum {
		163	CC_MAPPED = 0x01,
		164	CC_NOREUSE = 0x02, /* throw this away after tracing */
		165	CC_TRACE = 0x04,
		166	CC_TRACE_SUB = 0x08, /* trace sub calls */
		167	CC_TRACE_LINE = 0x10, /* trace each statement */
		168	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		169	};
136		170
137	/* this is a structure representing a c-level coroutine */	171	/* this is a structure representing a c-level coroutine */
138	typedef struct coro_cctx {	172	typedef struct coro_cctx {
139	struct coro_cctx *next;	173	struct coro_cctx *next;
140		174
141	/* the stack */	175	/* the stack */
142	void *sptr;	176	void *sptr;
143	ssize_t ssize; /* positive == mmap, otherwise malloc */	177	size_t ssize;
144		178
145	/* cpu state */	179	/* cpu state */
146	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	180	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
147	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */	181	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
148	JMPENV *top_env;	182	JMPENV *top_env;
149	coro_context cctx;	183	coro_context cctx;
150		184
151	int inuse;
152
153	#if USE_VALGRIND	185	#if CORO_USE_VALGRIND
154	int valgrind_id;	186	int valgrind_id;
155	#endif	187	#endif
		188	unsigned char flags;
156	} coro_cctx;	189	} coro_cctx;
157		190
158	enum {	191	enum {
159	CF_RUNNING = 0x0001, /* coroutine is running */	192	CF_RUNNING = 0x0001, /* coroutine is running */
160	CF_READY = 0x0002, /* coroutine is ready */	193	CF_READY = 0x0002, /* coroutine is ready */
161	CF_NEW = 0x0004, /* has never been switched to */	194	CF_NEW = 0x0004, /* has never been switched to */
162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	195	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
163	};	196	};
164		197
		198	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		199	typedef struct {
		200	SV *defsv;
		201	AV *defav;
		202	SV *errsv;
		203	SV *irsgv;
		204	#define VAR(name,type) type name;
		205	# include "state.h"
		206	#undef VAR
		207	} perl_slots;
		208
		209	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		210
165	/* this is a structure representing a perl-level coroutine */	211	/* this is a structure representing a perl-level coroutine */
166	struct coro {	212	struct coro {
167	/* the c coroutine allocated to this perl coroutine, if any */	213	/* the c coroutine allocated to this perl coroutine, if any */
168	coro_cctx *cctx;	214	coro_cctx *cctx;
169		215
		216	/* process data */
		217	AV *mainstack;
		218	perl_slots *slot; /* basically the saved sp */
		219
170	/* data associated with this coroutine (initial args) */	220	/* data associated with this coroutine (initial args) */
171	AV *args;	221	AV *args;
172	int refcnt;	222	int refcnt;
173	int save; /* CORO_SAVE flags */
174	int flags; /* CF_ flags */	223	int flags; /* CF_ flags */
175		224
176	/* optionally saved, might be zero */	225	/* statistics */
177	AV *defav; /* @_ */	226	int usecount; /* number of transfers to this coro */
178	SV *defsv; /* $_ */
179	SV *errsv; /* $@ */
180	SV *irssv; /* $/ */
181	SV *irssv_sv; /* real $/ cache */
182
183	#define VAR(name,type) type name;
184	# include "state.h"
185	#undef VAR
186		227
187	/* coro process data */	228	/* coro process data */
188	int prio;	229	int prio;
		230	SV *throw;
		231
		232	/* async_pool */
		233	SV *saved_deffh;
		234
		235	/* linked list */
		236	struct coro *next, *prev;
		237	HV *hv; /* the perl hash associated with this coro, if any */
189	};	238	};
190		239
191	typedef struct coro *Coro__State;	240	typedef struct coro *Coro__State;
192	typedef struct coro *Coro__State_or_hashref;	241	typedef struct coro *Coro__State_or_hashref;
193		242
…		…
202		251
203	/* for Coro.pm */	252	/* for Coro.pm */
204	static SV *coro_current;	253	static SV *coro_current;
205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	254	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
206	static int coro_nready;	255	static int coro_nready;
		256	static struct coro *coro_first;
207		257
208	/** lowlevel stuff **********************************************************/	258	/** lowlevel stuff **********************************************************/
209		259
210	static AV *	260	static AV *
211	coro_clone_padlist (CV *cv)	261	coro_clone_padlist (pTHX_ CV *cv)
212	{	262	{
213	AV *padlist = CvPADLIST (cv);	263	AV *padlist = CvPADLIST (cv);
214	AV *newpadlist, *newpad;	264	AV *newpadlist, *newpad;
215		265
216	newpadlist = newAV ();	266	newpadlist = newAV ();
…		…
228		278
229	return newpadlist;	279	return newpadlist;
230	}	280	}
231		281
232	static void	282	static void
233	free_padlist (AV *padlist)	283	free_padlist (pTHX_ AV *padlist)
234	{	284	{
235	/* may be during global destruction */	285	/* may be during global destruction */
236	if (SvREFCNT (padlist))	286	if (SvREFCNT (padlist))
237	{	287	{
238	I32 i = AvFILLp (padlist);	288	I32 i = AvFILLp (padlist);
…		…
259	AV *padlist;	309	AV *padlist;
260	AV *av = (AV *)mg->mg_obj;	310	AV *av = (AV *)mg->mg_obj;
261		311
262	/* casting is fun. */	312	/* casting is fun. */
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	313	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264	free_padlist (padlist);	314	free_padlist (aTHX_ padlist);
265		315
266	SvREFCNT_dec (av);	316	SvREFCNT_dec (av);
267		317
268	return 0;	318	return 0;
269	}	319	}
…		…
277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	327	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
278	? SvMAGIC (cv) \	328	? SvMAGIC (cv) \
279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	329	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
280	: 0	330	: 0
281		331
		332	static struct coro *
		333	SvSTATE_ (pTHX_ SV *coro)
		334	{
		335	HV *stash;
		336	MAGIC *mg;
		337
		338	if (SvROK (coro))
		339	coro = SvRV (coro);
		340
		341	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		342	croak ("Coro::State object required");
		343
		344	stash = SvSTASH (coro);
		345	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		346	{
		347	/* very slow, but rare, check */
		348	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		349	croak ("Coro::State object required");
		350	}
		351
		352	mg = CORO_MAGIC (coro);
		353	return (struct coro *)mg->mg_ptr;
		354	}
		355
		356	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		357
282	/* the next two functions merely cache the padlists */	358	/* the next two functions merely cache the padlists */
283	static void	359	static void
284	get_padlist (CV *cv)	360	get_padlist (pTHX_ CV *cv)
285	{	361	{
286	MAGIC *mg = CORO_MAGIC (cv);	362	MAGIC *mg = CORO_MAGIC (cv);
287	AV *av;	363	AV *av;
288		364
289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	365	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	366	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291	else	367	else
292	{	368	{
293	#if PREFER_PERL_FUNCTIONS	369	#if CORO_PREFER_PERL_FUNCTIONS
294	/* this is probably cleaner, but also slower? */	370	/* this is probably cleaner, but also slower? */
295	CV *cp = Perl_cv_clone (cv);	371	CV *cp = Perl_cv_clone (cv);
296	CvPADLIST (cv) = CvPADLIST (cp);	372	CvPADLIST (cv) = CvPADLIST (cp);
297	CvPADLIST (cp) = 0;	373	CvPADLIST (cp) = 0;
298	SvREFCNT_dec (cp);	374	SvREFCNT_dec (cp);
299	#else	375	#else
300	CvPADLIST (cv) = coro_clone_padlist (cv);	376	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
301	#endif	377	#endif
302	}	378	}
303	}	379	}
304		380
305	static void	381	static void
306	put_padlist (CV *cv)	382	put_padlist (pTHX_ CV *cv)
307	{	383	{
308	MAGIC *mg = CORO_MAGIC (cv);	384	MAGIC *mg = CORO_MAGIC (cv);
309	AV *av;	385	AV *av;
310		386
311	if (!mg)	387	if (expect_false (!mg))
312	{	388	{
313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	389	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	390	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
315	mg->mg_virtual = &vtbl_coro;	391	mg->mg_virtual = &vtbl_coro;
316	mg->mg_obj = (SV *)newAV ();	392	mg->mg_obj = (SV *)newAV ();
317	}	393	}
318		394
319	av = (AV *)mg->mg_obj;	395	av = (AV *)mg->mg_obj;
320		396
321	if (AvFILLp (av) >= AvMAX (av))	397	if (expect_false (AvFILLp (av) >= AvMAX (av)))
322	av_extend (av, AvMAX (av) + 1);	398	av_extend (av, AvMAX (av) + 1);
323		399
324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	400	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
325	}	401	}
326		402
327	/** load & save, init *******************************************************/	403	/** load & save, init *******************************************************/
328		404
329	#define SB do {
330	#define SE } while (0)
331
332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
333
334	static void	405	static void
335	load_perl (Coro__State c)	406	load_perl (pTHX_ Coro__State c)
336	{	407	{
		408	perl_slots *slot = c->slot;
		409	c->slot = 0;
		410
		411	PL_mainstack = c->mainstack;
		412
		413	GvSV (PL_defgv) = slot->defsv;
		414	GvAV (PL_defgv) = slot->defav;
		415	GvSV (PL_errgv) = slot->errsv;
		416	GvSV (irsgv) = slot->irsgv;
		417
337	#define VAR(name,type) PL_ ## name = c->name;	418	#define VAR(name,type) PL_ ## name = slot->name;
338	# include "state.h"	419	# include "state.h"
339	#undef VAR	420	#undef VAR
340
341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
344	if (c->irssv)
345	{
346	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
347	SvREFCNT_dec (c->irssv);
348	else
349	{
350	REPLACE_SV (PL_rs, c->irssv);
351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
352	sv_setsv (c->irssv_sv, PL_rs);
353	}
354	}
355		421
356	{	422	{
357	dSP;	423	dSP;
		424
358	CV *cv;	425	CV *cv;
359		426
360	/* now do the ugly restore mess */	427	/* now do the ugly restore mess */
361	while ((cv = (CV *)POPs))	428	while (expect_true (cv = (CV *)POPs))
362	{	429	{
363	put_padlist (cv); /* mark this padlist as available */	430	put_padlist (aTHX_ cv); /* mark this padlist as available */
364	CvDEPTH (cv) = PTR2IV (POPs);	431	CvDEPTH (cv) = PTR2IV (POPs);
365	CvPADLIST (cv) = (AV *)POPs;	432	CvPADLIST (cv) = (AV *)POPs;
366	}	433	}
367		434
368	PUTBACK;	435	PUTBACK;
369	}	436	}
370	assert (!PL_comppad || AvARRAY (PL_comppad));//D
371	}	437	}
372		438
373	static void	439	static void
374	save_perl (Coro__State c)	440	save_perl (pTHX_ Coro__State c)
375	{	441	{
376	assert (!PL_comppad || AvARRAY (PL_comppad));//D
377	{	442	{
378	dSP;	443	dSP;
379	I32 cxix = cxstack_ix;	444	I32 cxix = cxstack_ix;
380	PERL_CONTEXT *ccstk = cxstack;	445	PERL_CONTEXT *ccstk = cxstack;
381	PERL_SI *top_si = PL_curstackinfo;	446	PERL_SI *top_si = PL_curstackinfo;
…		…
383	/*	448	/*
384	* the worst thing you can imagine happens first - we have to save	449	* the worst thing you can imagine happens first - we have to save
385	* (and reinitialize) all cv's in the whole callchain :(	450	* (and reinitialize) all cv's in the whole callchain :(
386	*/	451	*/
387		452
388	EXTEND (SP, 3 + 1);
389	PUSHs (Nullsv);	453	XPUSHs (Nullsv);
390	/* this loop was inspired by pp_caller */	454	/* this loop was inspired by pp_caller */
391	for (;;)	455	for (;;)
392	{	456	{
393	while (cxix >= 0)	457	while (expect_true (cxix >= 0))
394	{	458	{
395	PERL_CONTEXT *cx = &ccstk[cxix--];	459	PERL_CONTEXT *cx = &ccstk[cxix--];
396		460
397	if (CxTYPE (cx) == CXt_SUB)	461	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
398	{	462	{
399	CV *cv = cx->blk_sub.cv;	463	CV *cv = cx->blk_sub.cv;
400		464
401	if (CvDEPTH (cv))	465	if (expect_true (CvDEPTH (cv)))
402	{	466	{
403	EXTEND (SP, 3);	467	EXTEND (SP, 3);
404	PUSHs ((SV *)CvPADLIST (cv));	468	PUSHs ((SV *)CvPADLIST (cv));
405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	469	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
406	PUSHs ((SV *)cv);	470	PUSHs ((SV *)cv);
407		471
408	CvDEPTH (cv) = 0;	472	CvDEPTH (cv) = 0;
409	get_padlist (cv);	473	get_padlist (aTHX_ cv);
410	}	474	}
411	}	475	}
412	}	476	}
413		477
414	if (top_si->si_type == PERLSI_MAIN)	478	if (expect_true (top_si->si_type == PERLSI_MAIN))
415	break;	479	break;
416		480
417	top_si = top_si->si_prev;	481	top_si = top_si->si_prev;
418	ccstk = top_si->si_cxstack;	482	ccstk = top_si->si_cxstack;
419	cxix = top_si->si_cxix;	483	cxix = top_si->si_cxix;
420	}	484	}
421		485
422	PUTBACK;	486	PUTBACK;
423	}	487	}
424		488
425	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	489	/* allocate some space on the context stack for our purposes */
426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	490	{
427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	491	/* we manually unroll here, as usually 2 slots is enough */
428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	492	int i;
		493	if (SLOT_COUNT >= 1) CXINC;
		494	if (SLOT_COUNT >= 2) CXINC;
		495	if (SLOT_COUNT >= 3) CXINC;
		496	for (i = 3; i < SLOT_COUNT; ++i)
		497	CXINC;
429		498
		499	cxstack_ix -= SLOT_COUNT; /* undo allocation */
		500	}
		501
		502	c->mainstack = PL_mainstack;
		503
		504	{
		505	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		506
		507	slot->defav = GvAV (PL_defgv);
		508	slot->defsv = DEFSV;
		509	slot->errsv = ERRSV;
		510	slot->irsgv = GvSV (irsgv);
		511
430	#define VAR(name,type)c->name = PL_ ## name;	512	#define VAR(name,type) slot->name = PL_ ## name;
431	# include "state.h"	513	# include "state.h"
432	#undef VAR	514	#undef VAR
		515	}
433	}	516	}
434		517
435	/*	518	/*
436	* allocate various perl stacks. This is an exact copy	519	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	520	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	521	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	522	* not usually need a lot of stackspace.
440	*/	523	*/
441	#if PREFER_PERL_FUNCTIONS	524	#if CORO_PREFER_PERL_FUNCTIONS
442	# define coro_init_stacks init_stacks	525	# define coro_init_stacks init_stacks
443	#else	526	#else
444	static void	527	static void
445	coro_init_stacks ()	528	coro_init_stacks (pTHX)
446	{	529	{
447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	530	PL_curstackinfo = new_stackinfo(32, 8);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	531	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	532	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	533	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		534
452	PL_stack_base = AvARRAY(PL_curstack);	535	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	536	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	537	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		538
456	New(50,PL_tmps_stack,128,SV*);	539	New(50,PL_tmps_stack,32,SV*);
457	PL_tmps_floor = -1;	540	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	541	PL_tmps_ix = -1;
459	PL_tmps_max = 128;	542	PL_tmps_max = 32;
460		543
461	New(54,PL_markstack,32,I32);	544	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	545	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 32;	546	PL_markstack_max = PL_markstack + 16;
464		547
465	#ifdef SET_MARK_OFFSET	548	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	549	SET_MARK_OFFSET;
467	#endif	550	#endif
468		551
469	New(54,PL_scopestack,32,I32);	552	New(54,PL_scopestack,8,I32);
470	PL_scopestack_ix = 0;	553	PL_scopestack_ix = 0;
471	PL_scopestack_max = 32;	554	PL_scopestack_max = 8;
472		555
473	New(54,PL_savestack,64,ANY);	556	New(54,PL_savestack,24,ANY);
474	PL_savestack_ix = 0;	557	PL_savestack_ix = 0;
475	PL_savestack_max = 64;	558	PL_savestack_max = 24;
476		559
477	#if !PERL_VERSION_ATLEAST (5,9,0)	560	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,16,OP*);	561	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	562	PL_retstack_ix = 0;
480	PL_retstack_max = 16;	563	PL_retstack_max = 4;
481	#endif	564	#endif
482	}	565	}
483	#endif	566	#endif
484		567
485	/*	568	/*
486	* destroy the stacks, the callchain etc...	569	* destroy the stacks, the callchain etc...
487	*/	570	*/
488	static void	571	static void
489	coro_destroy_stacks ()	572	coro_destroy_stacks (pTHX)
490	{	573	{
491	if (!IN_DESTRUCT)
492	{
493	/* restore all saved variables and stuff */
494	LEAVE_SCOPE (0);
495	assert (PL_tmps_floor == -1);
496
497	/* free all temporaries */
498	FREETMPS;
499	assert (PL_tmps_ix == -1);
500
501	/* unwind all extra stacks */
502	POPSTACK_TO (PL_mainstack);
503
504	/* unwind main stack */
505	dounwind (-1);
506	}
507
508	while (PL_curstackinfo->si_next)	574	while (PL_curstackinfo->si_next)
509	PL_curstackinfo = PL_curstackinfo->si_next;	575	PL_curstackinfo = PL_curstackinfo->si_next;
510		576
511	while (PL_curstackinfo)	577	while (PL_curstackinfo)
512	{	578	{
…		…
527	#if !PERL_VERSION_ATLEAST (5,9,0)	593	#if !PERL_VERSION_ATLEAST (5,9,0)
528	Safefree (PL_retstack);	594	Safefree (PL_retstack);
529	#endif	595	#endif
530	}	596	}
531		597
		598	static size_t
		599	coro_rss (pTHX_ struct coro *coro)
		600	{
		601	size_t rss = sizeof (*coro);
		602
		603	if (coro->mainstack)
		604	{
		605	perl_slots tmp_slot;
		606	perl_slots *slot;
		607
		608	if (coro->flags & CF_RUNNING)
		609	{
		610	slot = &tmp_slot;
		611
		612	#define VAR(name,type) slot->name = PL_ ## name;
		613	# include "state.h"
		614	#undef VAR
		615	}
		616	else
		617	slot = coro->slot;
		618
		619	rss += sizeof (slot->curstackinfo);
		620	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		621	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		622	rss += slot->tmps_max * sizeof (SV *);
		623	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		624	rss += slot->scopestack_max * sizeof (I32);
		625	rss += slot->savestack_max * sizeof (ANY);
		626
		627	#if !PERL_VERSION_ATLEAST (5,9,0)
		628	rss += slot->retstack_max * sizeof (OP *);
		629	#endif
		630	}
		631
		632	return rss;
		633	}
		634
532	/** coroutine stack handling ************************************************/	635	/** coroutine stack handling ************************************************/
533		636
534	static void	637	static void
535	setup_coro (struct coro *coro)	638	coro_setup (pTHX_ struct coro *coro)
536	{	639	{
537	/*	640	/*
538	* emulate part of the perl startup here.	641	* emulate part of the perl startup here.
539	*/	642	*/
540
541	coro_init_stacks ();	643	coro_init_stacks (aTHX);
542		644
		645	PL_runops = RUNOPS_DEFAULT;
543	PL_curcop = &PL_compiling;	646	PL_curcop = &PL_compiling;
544	PL_in_eval = EVAL_NULL;	647	PL_in_eval = EVAL_NULL;
545	PL_comppad = 0;	648	PL_comppad = 0;
546	PL_curpm = 0;	649	PL_curpm = 0;
		650	PL_curpad = 0;
547	PL_localizing = 0;	651	PL_localizing = 0;
548	PL_dirty = 0;	652	PL_dirty = 0;
549	PL_restartop = 0;	653	PL_restartop = 0;
		654	PL_diehook = 0;
		655	PL_warnhook = 0;
		656
		657	GvSV (PL_defgv) = newSV (0);
		658	GvAV (PL_defgv) = coro->args; coro->args = 0;
		659	GvSV (PL_errgv) = newSV (0);
		660	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		661	PL_rs = newSVsv (GvSV (irsgv));
		662	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
550		663
551	{	664	{
552	dSP;	665	dSP;
553	LOGOP myop;	666	LOGOP myop;
554		667
555	SvREFCNT_dec (GvAV (PL_defgv));
556	GvAV (PL_defgv) = coro->args; coro->args = 0;
557
558	Zero (&myop, 1, LOGOP);	668	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	669	myop.op_next = Nullop;
560	myop.op_flags = OPf_WANT_VOID;	670	myop.op_flags = OPf_WANT_VOID;
561		671
562	PUSHMARK (SP);	672	PUSHMARK (SP);
563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	673	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
564	PUTBACK;	674	PUTBACK;
565	PL_op = (OP *)&myop;	675	PL_op = (OP *)&myop;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	676	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	677	SPAGAIN;
568	}	678	}
569		679
570	ENTER; /* necessary e.g. for dounwind */	680	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
571	}	681	}
572		682
573	static void	683	static void
		684	coro_destroy (pTHX_ struct coro *coro)
		685	{
		686	if (!IN_DESTRUCT)
		687	{
		688	/* restore all saved variables and stuff */
		689	LEAVE_SCOPE (0);
		690	assert (PL_tmps_floor == -1);
		691
		692	/* free all temporaries */
		693	FREETMPS;
		694	assert (PL_tmps_ix == -1);
		695
		696	/* unwind all extra stacks */
		697	POPSTACK_TO (PL_mainstack);
		698
		699	/* unwind main stack */
		700	dounwind (-1);
		701	}
		702
		703	SvREFCNT_dec (GvSV (PL_defgv));
		704	SvREFCNT_dec (GvAV (PL_defgv));
		705	SvREFCNT_dec (GvSV (PL_errgv));
		706	SvREFCNT_dec (PL_defoutgv);
		707	SvREFCNT_dec (PL_rs);
		708	SvREFCNT_dec (GvSV (irsgv));
		709
		710	SvREFCNT_dec (PL_diehook);
		711	SvREFCNT_dec (PL_warnhook);
		712
		713	SvREFCNT_dec (coro->saved_deffh);
		714	SvREFCNT_dec (coro->throw);
		715
		716	coro_destroy_stacks (aTHX);
		717	}
		718
		719	static void
574	free_coro_mortal ()	720	free_coro_mortal (pTHX)
575	{	721	{
576	if (coro_mortal)	722	if (expect_true (coro_mortal))
577	{	723	{
578	SvREFCNT_dec (coro_mortal);	724	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;	725	coro_mortal = 0;
580	}	726	}
581	}	727	}
582		728
		729	static int
		730	runops_trace (pTHX)
		731	{
		732	COP *oldcop = 0;
		733	int oldcxix = -2;
		734	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		735	coro_cctx *cctx = coro->cctx;
		736
		737	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		738	{
		739	PERL_ASYNC_CHECK ();
		740
		741	if (cctx->flags & CC_TRACE_ALL)
		742	{
		743	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		744	{
		745	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		746	SV **bot, **top;
		747	AV *av = newAV (); /* return values */
		748	SV **cb;
		749	dSP;
		750
		751	GV *gv = CvGV (cx->blk_sub.cv);
		752	SV *fullname = sv_2mortal (newSV (0));
		753	if (isGV (gv))
		754	gv_efullname3 (fullname, gv, 0);
		755
		756	bot = PL_stack_base + cx->blk_oldsp + 1;
		757	top = cx->blk_gimme == G_ARRAY ? SP + 1
		758	: cx->blk_gimme == G_SCALAR ? bot + 1
		759	: bot;
		760
		761	av_extend (av, top - bot);
		762	while (bot < top)
		763	av_push (av, SvREFCNT_inc (*bot++));
		764
		765	PL_runops = RUNOPS_DEFAULT;
		766	ENTER;
		767	SAVETMPS;
		768	EXTEND (SP, 3);
		769	PUSHMARK (SP);
		770	PUSHs (&PL_sv_no);
		771	PUSHs (fullname);
		772	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		773	PUTBACK;
		774	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		775	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		776	SPAGAIN;
		777	FREETMPS;
		778	LEAVE;
		779	PL_runops = runops_trace;
		780	}
		781
		782	if (oldcop != PL_curcop)
		783	{
		784	oldcop = PL_curcop;
		785
		786	if (PL_curcop != &PL_compiling)
		787	{
		788	SV **cb;
		789
		790	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		791	{
		792	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		793
		794	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		795	{
		796	runops_proc_t old_runops = PL_runops;
		797	dSP;
		798	GV *gv = CvGV (cx->blk_sub.cv);
		799	SV *fullname = sv_2mortal (newSV (0));
		800
		801	if (isGV (gv))
		802	gv_efullname3 (fullname, gv, 0);
		803
		804	PL_runops = RUNOPS_DEFAULT;
		805	ENTER;
		806	SAVETMPS;
		807	EXTEND (SP, 3);
		808	PUSHMARK (SP);
		809	PUSHs (&PL_sv_yes);
		810	PUSHs (fullname);
		811	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		812	PUTBACK;
		813	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		814	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		815	SPAGAIN;
		816	FREETMPS;
		817	LEAVE;
		818	PL_runops = runops_trace;
		819	}
		820
		821	oldcxix = cxstack_ix;
		822	}
		823
		824	if (cctx->flags & CC_TRACE_LINE)
		825	{
		826	dSP;
		827
		828	PL_runops = RUNOPS_DEFAULT;
		829	ENTER;
		830	SAVETMPS;
		831	EXTEND (SP, 3);
		832	PL_runops = RUNOPS_DEFAULT;
		833	PUSHMARK (SP);
		834	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		835	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		836	PUTBACK;
		837	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		838	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		839	SPAGAIN;
		840	FREETMPS;
		841	LEAVE;
		842	PL_runops = runops_trace;
		843	}
		844	}
		845	}
		846	}
		847	}
		848
		849	TAINT_NOT;
		850	return 0;
		851	}
		852
583	/* inject a fake call to Coro::State::_cctx_init into the execution */	853	/* inject a fake call to Coro::State::_cctx_init into the execution */
		854	/* _cctx_init should be careful, as it could be called at almost any time */
		855	/* during execution of a perl program */
584	static void NOINLINE	856	static void NOINLINE
585	prepare_cctx (coro_cctx *cctx)	857	prepare_cctx (pTHX_ coro_cctx *cctx)
586	{	858	{
587	dSP;	859	dSP;
588	LOGOP myop;	860	LOGOP myop;
		861
		862	PL_top_env = &PL_start_env;
		863
		864	if (cctx->flags & CC_TRACE)
		865	PL_runops = runops_trace;
589		866
590	Zero (&myop, 1, LOGOP);	867	Zero (&myop, 1, LOGOP);
591	myop.op_next = PL_op;	868	myop.op_next = PL_op;
592	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	869	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
593		870
…		…
599	PL_op = (OP *)&myop;	876	PL_op = (OP *)&myop;
600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	877	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
601	SPAGAIN;	878	SPAGAIN;
602	}	879	}
603		880
		881	/*
		882	* this is a _very_ stripped down perl interpreter ;)
		883	*/
604	static void	884	static void
605	coro_run (void *arg)	885	coro_run (void *arg)
606	{	886	{
		887	dTHX;
		888
607	/* coro_run is the alternative tail of transfer(), so unlock here. */	889	/* coro_run is the alternative tail of transfer(), so unlock here. */
608	UNLOCK;	890	UNLOCK;
609		891
610	/*	892	/* we now skip the entersub that lead to transfer() */
611	* this is a _very_ stripped down perl interpreter ;)	893	PL_op = PL_op->op_next;
612	*/
613	PL_top_env = &PL_start_env;
614		894
615	/* inject call to cctx_init */	895	/* inject a fake subroutine call to cctx_init */
616	prepare_cctx ((coro_cctx *)arg);	896	prepare_cctx (aTHX_ (coro_cctx *)arg);
617		897
618	/* somebody will hit me for both perl_run and PL_restartop */	898	/* somebody or something will hit me for both perl_run and PL_restartop */
619	PL_restartop = PL_op;	899	PL_restartop = PL_op;
620	perl_run (PL_curinterp);	900	perl_run (PL_curinterp);
621		901
622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	902	/*
623	abort ();	903	* If perl-run returns we assume exit() was being called or the coro
		904	* fell off the end, which seems to be the only valid (non-bug)
		905	* reason for perl_run to return. We try to exit by jumping to the
		906	* bootstrap-time "top" top_env, as we cannot restore the "main"
		907	* coroutine as Coro has no such concept
		908	*/
		909	PL_top_env = main_top_env;
		910	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
624	}	911	}
625		912
626	static coro_cctx *	913	static coro_cctx *
627	cctx_new ()	914	cctx_new ()
628	{	915	{
629	coro_cctx *cctx;	916	coro_cctx *cctx;
		917	void *stack_start;
		918	size_t stack_size;
630		919
631	++cctx_count;	920	++cctx_count;
632		921
633	Newz (0, cctx, 1, coro_cctx);	922	Newz (0, cctx, 1, coro_cctx);
634		923
635	#if HAVE_MMAP	924	#if HAVE_MMAP
636		925
637	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	926	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
638	/* mmap supposedly does allocate-on-write for us */	927	/* mmap supposedly does allocate-on-write for us */
639	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	928	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
640		929
641	if (cctx->sptr != (void *)-1)	930	if (cctx->sptr != (void *)-1)
642	{	931	{
643	# if STACKGUARD	932	# if CORO_STACKGUARD
644	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	933	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
645	# endif	934	# endif
646	REGISTER_STACK (
647	cctx,
648	STACKGUARD * PAGESIZE + (char *)cctx->sptr,	935	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
649	cctx->ssize + (char *)cctx->sptr	936	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
650	);	937	cctx->flags |= CC_MAPPED;
651
652	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
653	}	938	}
654	else	939	else
655	#endif	940	#endif
656	{	941	{
657	cctx->ssize = -STACKSIZE * (long)sizeof (long);	942	cctx->ssize = coro_stacksize * (long)sizeof (long);
658	New (0, cctx->sptr, STACKSIZE, long);	943	New (0, cctx->sptr, coro_stacksize, long);
659		944
660	if (!cctx->sptr)	945	if (!cctx->sptr)
661	{	946	{
662	perror ("FATAL: unable to allocate stack for coroutine");	947	perror ("FATAL: unable to allocate stack for coroutine");
663	_exit (EXIT_FAILURE);	948	_exit (EXIT_FAILURE);
664	}	949	}
665		950
666	REGISTER_STACK (	951	stack_start = cctx->sptr;
667	cctx,	952	stack_size = cctx->ssize;
668	(char *)cctx->sptr,	953	}
669	(char *)cctx->sptr - cctx->ssize
670	);
671		954
		955	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
672	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);	956	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
673	}
674		957
675	return cctx;	958	return cctx;
676	}	959	}
677		960
678	static void	961	static void
…		…
681	if (!cctx)	964	if (!cctx)
682	return;	965	return;
683		966
684	--cctx_count;	967	--cctx_count;
685		968
686	#if USE_VALGRIND	969	#if CORO_USE_VALGRIND
687	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	970	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
688	#endif	971	#endif
689		972
690	#if HAVE_MMAP	973	#if HAVE_MMAP
691	if (cctx->ssize > 0)	974	if (cctx->flags & CC_MAPPED)
692	munmap (cctx->sptr, cctx->ssize);	975	munmap (cctx->sptr, cctx->ssize);
693	else	976	else
694	#endif	977	#endif
695	Safefree (cctx->sptr);	978	Safefree (cctx->sptr);
696		979
697	Safefree (cctx);	980	Safefree (cctx);
698	}	981	}
699		982
		983	/* wether this cctx should be destructed */
		984	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		985
700	static coro_cctx *	986	static coro_cctx *
701	cctx_get ()	987	cctx_get (pTHX)
702	{	988	{
703	coro_cctx *cctx;	989	while (expect_true (cctx_first))
704
705	if (cctx_first)
706	{	990	{
707	cctx = cctx_first;	991	coro_cctx *cctx = cctx_first;
708	cctx_first = cctx->next;	992	cctx_first = cctx->next;
709	--cctx_idle;	993	--cctx_idle;
710	}	994
711	else	995	if (expect_true (!CCTX_EXPIRED (cctx)))
712	{	996	return cctx;
713	cctx = cctx_new ();	997
714	PL_op = PL_op->op_next;	998	cctx_destroy (cctx);
715	}	999	}
716		1000
717	return cctx;	1001	return cctx_new ();
718	}	1002	}
719		1003
720	static void	1004	static void
721	cctx_put (coro_cctx *cctx)	1005	cctx_put (coro_cctx *cctx)
722	{	1006	{
723	/* free another cctx if overlimit */	1007	/* free another cctx if overlimit */
724	if (cctx_idle >= MAX_IDLE_CCTX)	1008	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
725	{	1009	{
726	coro_cctx *first = cctx_first;	1010	coro_cctx *first = cctx_first;
727	cctx_first = first->next;	1011	cctx_first = first->next;
728	--cctx_idle;	1012	--cctx_idle;
729		1013
730	assert (!first->inuse);
731	cctx_destroy (first);	1014	cctx_destroy (first);
732	}	1015	}
733		1016
734	++cctx_idle;	1017	++cctx_idle;
735	cctx->next = cctx_first;	1018	cctx->next = cctx_first;
736	cctx_first = cctx;	1019	cctx_first = cctx;
737	}	1020	}
738		1021
739	/** coroutine switching *****************************************************/	1022	/** coroutine switching *****************************************************/
740		1023
741	/* never call directly, always through the coro_state_transfer global variable */	1024	static void
		1025	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1026	{
		1027	if (expect_true (prev != next))
		1028	{
		1029	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1030	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1031
		1032	if (expect_false (next->flags & CF_RUNNING))
		1033	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1034
		1035	if (expect_false (next->flags & CF_DESTROYED))
		1036	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1037
		1038	if (
		1039	#if PERL_VERSION_ATLEAST (5,9,0)
		1040	expect_false (PL_parser)
		1041	#else
		1042	expect_false (PL_lex_state != LEX_NOTPARSING)
		1043	#endif
		1044	)
		1045	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1046	}
		1047	}
		1048
		1049	/* always use the TRANSFER macro */
742	static void NOINLINE	1050	static void NOINLINE
743	transfer (struct coro *prev, struct coro *next)	1051	transfer (pTHX_ struct coro *prev, struct coro *next)
744	{	1052	{
745	dSTACKLEVEL;	1053	dSTACKLEVEL;
746		1054
747	/* sometimes transfer is only called to set idle_sp */	1055	/* sometimes transfer is only called to set idle_sp */
748	if (!next)	1056	if (expect_false (!next))
749	{	1057	{
750	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1058	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
751	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1059	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
752	}	1060	}
753	else if (prev != next)	1061	else if (expect_true (prev != next))
754	{	1062	{
755	coro_cctx *prev__cctx;	1063	coro_cctx *prev__cctx;
756		1064
757	if (prev->flags & CF_NEW)	1065	if (expect_false (prev->flags & CF_NEW))
758	{	1066	{
759	/* create a new empty context */	1067	/* create a new empty context */
760	Newz (0, prev->cctx, 1, coro_cctx);	1068	Newz (0, prev->cctx, 1, coro_cctx);
761	prev->cctx->inuse = 1;
762	prev->flags &= ~CF_NEW;	1069	prev->flags &= ~CF_NEW;
763	prev->flags |= CF_RUNNING;	1070	prev->flags |= CF_RUNNING;
764	}	1071	}
765		1072
766	/*TODO: must not croak here */
767	if (!prev->flags & CF_RUNNING)
768	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
769
770	if (next->flags & CF_RUNNING)
771	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
772
773	if (next->flags & CF_DESTROYED)
774	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
775
776	prev->flags &= ~CF_RUNNING;	1073	prev->flags &= ~CF_RUNNING;
777	next->flags |= CF_RUNNING;	1074	next->flags |= CF_RUNNING;
778		1075
779	LOCK;	1076	LOCK;
780		1077
781	if (next->flags & CF_NEW)	1078	if (expect_false (next->flags & CF_NEW))
782	{	1079	{
783	/* need to start coroutine */	1080	/* need to start coroutine */
784	next->flags &= ~CF_NEW;	1081	next->flags &= ~CF_NEW;
785	/* first get rid of the old state */	1082	/* first get rid of the old state */
786	save_perl (prev);	1083	save_perl (aTHX_ prev);
787	/* setup coroutine call */	1084	/* setup coroutine call */
788	setup_coro (next);	1085	coro_setup (aTHX_ next);
789	/* need a new stack */
790	assert (!next->cctx);
791	}	1086	}
792	else	1087	else
793	{	1088	{
794	/* coroutine already started */	1089	/* coroutine already started */
795	save_perl (prev);	1090	save_perl (aTHX_ prev);
796	load_perl (next);	1091	load_perl (aTHX_ next);
797	}	1092	}
798		1093
799	prev__cctx = prev->cctx;	1094	prev__cctx = prev->cctx;
800		1095
801	/* possibly "free" the cctx */	1096	/* possibly "free" the cctx */
802	if (prev__cctx->idle_sp == STACKLEVEL)	1097	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
803	{	1098	{
804	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1099	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
805	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1100	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
806		1101
807	prev->cctx = 0;	1102	prev->cctx = 0;
808		1103
		1104	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1105	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1106	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1107	next->cctx = cctx_get (aTHX);
		1108
809	cctx_put (prev__cctx);	1109	cctx_put (prev__cctx);
810	prev__cctx->inuse = 0;
811	}	1110	}
812		1111
		1112	++next->usecount;
		1113
813	if (!next->cctx)	1114	if (expect_true (!next->cctx))
814	{
815	next->cctx = cctx_get ();	1115	next->cctx = cctx_get (aTHX);
816	assert (!next->cctx->inuse);
817	next->cctx->inuse = 1;
818	}
819		1116
820	if (prev__cctx != next->cctx)	1117	if (expect_false (prev__cctx != next->cctx))
821	{	1118	{
822	prev__cctx->top_env = PL_top_env;	1119	prev__cctx->top_env = PL_top_env;
823	PL_top_env = next->cctx->top_env;	1120	PL_top_env = next->cctx->top_env;
824	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1121	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
825	}	1122	}
826		1123
827	free_coro_mortal ();	1124	free_coro_mortal (aTHX);
828	UNLOCK;	1125	UNLOCK;
		1126
		1127	if (expect_false (prev->throw || next->throw))
		1128	{
		1129	struct coro *coro = SvSTATE (coro_current);
		1130
		1131	if (coro->throw)
		1132	{
		1133	SV *exception = coro->throw;
		1134	coro->throw = 0;
		1135	sv_setsv (ERRSV, exception);
		1136	croak (0);
		1137	}
		1138	}
829	}	1139	}
830	}	1140	}
831		1141
832	struct transfer_args	1142	struct transfer_args
833	{	1143	{
834	struct coro *prev, *next;	1144	struct coro *prev, *next;
835	};	1145	};
836		1146
837	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1147	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1148	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
838		1149
839	/** high level stuff ********************************************************/	1150	/** high level stuff ********************************************************/
840		1151
841	static int	1152	static int
842	coro_state_destroy (struct coro *coro)	1153	coro_state_destroy (pTHX_ struct coro *coro)
843	{	1154	{
844	if (coro->flags & CF_DESTROYED)	1155	if (coro->flags & CF_DESTROYED)
845	return 0;	1156	return 0;
846		1157
847	coro->flags |= CF_DESTROYED;	1158	coro->flags |= CF_DESTROYED;
…		…
859		1170
860	if (coro->mainstack && coro->mainstack != main_mainstack)	1171	if (coro->mainstack && coro->mainstack != main_mainstack)
861	{	1172	{
862	struct coro temp;	1173	struct coro temp;
863		1174
864	assert (!(coro->flags & CF_RUNNING));
865
866	Zero (&temp, 1, struct coro);
867	temp.save = CORO_SAVE_ALL;
868
869	if (coro->flags & CF_RUNNING)	1175	if (coro->flags & CF_RUNNING)
870	croak ("FATAL: tried to destroy currently running coroutine");	1176	croak ("FATAL: tried to destroy currently running coroutine");
871		1177
872	save_perl (&temp);	1178	save_perl (aTHX_ &temp);
873	load_perl (coro);	1179	load_perl (aTHX_ coro);
874		1180
875	coro_destroy_stacks ();	1181	coro_destroy (aTHX_ coro);
876		1182
877	load_perl (&temp); /* this will get rid of defsv etc.. */	1183	load_perl (aTHX_ &temp);
878		1184
879	coro->mainstack = 0;	1185	coro->slot = 0;
880	}	1186	}
881		1187
882	cctx_destroy (coro->cctx);	1188	cctx_destroy (coro->cctx);
883	SvREFCNT_dec (coro->args);	1189	SvREFCNT_dec (coro->args);
884		1190
		1191	if (coro->next) coro->next->prev = coro->prev;
		1192	if (coro->prev) coro->prev->next = coro->next;
		1193	if (coro == coro_first) coro_first = coro->next;
		1194
885	return 1;	1195	return 1;
886	}	1196	}
887		1197
888	static int	1198	static int
889	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1199	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
890	{	1200	{
891	struct coro *coro = (struct coro *)mg->mg_ptr;	1201	struct coro *coro = (struct coro *)mg->mg_ptr;
892	mg->mg_ptr = 0;	1202	mg->mg_ptr = 0;
893		1203
		1204	coro->hv = 0;
		1205
894	if (--coro->refcnt < 0)	1206	if (--coro->refcnt < 0)
895	{	1207	{
896	coro_state_destroy (coro);	1208	coro_state_destroy (aTHX_ coro);
897	Safefree (coro);	1209	Safefree (coro);
898	}	1210	}
899		1211
900	return 0;	1212	return 0;
901	}	1213	}
…		…
919	#else	1231	#else
920	# define MGf_DUP 0	1232	# define MGf_DUP 0
921	#endif	1233	#endif
922	};	1234	};
923		1235
924	static struct coro *
925	SvSTATE (SV *coro)
926	{
927	HV *stash;
928	MAGIC *mg;
929
930	if (SvROK (coro))
931	coro = SvRV (coro);
932
933	stash = SvSTASH (coro);
934	if (stash != coro_stash && stash != coro_state_stash)
935	{
936	/* very slow, but rare, check */
937	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
938	croak ("Coro::State object required");
939	}
940
941	mg = SvMAGIC (coro);
942	assert (mg->mg_type == PERL_MAGIC_ext);
943	return (struct coro *)mg->mg_ptr;
944	}
945
946	static void	1236	static void
947	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1237	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
948	{	1238	{
949	ta->prev = SvSTATE (prev_sv);	1239	ta->prev = SvSTATE (prev_sv);
950	ta->next = SvSTATE (next_sv);	1240	ta->next = SvSTATE (next_sv);
		1241	TRANSFER_CHECK (*ta);
951	}	1242	}
952		1243
953	static void	1244	static void
954	api_transfer (SV *prev_sv, SV *next_sv)	1245	api_transfer (SV *prev_sv, SV *next_sv)
955	{	1246	{
		1247	dTHX;
956	struct transfer_args ta;	1248	struct transfer_args ta;
957		1249
958	prepare_transfer (&ta, prev_sv, next_sv);	1250	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
959	TRANSFER (ta);	1251	TRANSFER (ta);
960	}	1252	}
961		1253
962	static int
963	api_save (SV *coro_sv, int new_save)
964	{
965	struct coro *coro = SvSTATE (coro_sv);
966	int old_save = coro->save;
967
968	if (new_save >= 0)
969	coro->save = new_save;
970
971	return old_save;
972	}
973
974	/** Coro ********************************************************************/	1254	/** Coro ********************************************************************/
975		1255
976	static void	1256	static void
977	coro_enq (SV *coro_sv)	1257	coro_enq (pTHX_ SV *coro_sv)
978	{	1258	{
979	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1259	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
980	}	1260	}
981		1261
982	static SV *	1262	static SV *
983	coro_deq (int min_prio)	1263	coro_deq (pTHX_ int min_prio)
984	{	1264	{
985	int prio = PRIO_MAX - PRIO_MIN;	1265	int prio = PRIO_MAX - PRIO_MIN;
986		1266
987	min_prio -= PRIO_MIN;	1267	min_prio -= PRIO_MIN;
988	if (min_prio < 0)	1268	if (min_prio < 0)
…		…
996	}	1276	}
997		1277
998	static int	1278	static int
999	api_ready (SV *coro_sv)	1279	api_ready (SV *coro_sv)
1000	{	1280	{
		1281	dTHX;
1001	struct coro *coro;	1282	struct coro *coro;
1002		1283
1003	if (SvROK (coro_sv))	1284	if (SvROK (coro_sv))
1004	coro_sv = SvRV (coro_sv);	1285	coro_sv = SvRV (coro_sv);
1005		1286
…		…
1009	return 0;	1290	return 0;
1010		1291
1011	coro->flags |= CF_READY;	1292	coro->flags |= CF_READY;
1012		1293
1013	LOCK;	1294	LOCK;
1014	coro_enq (SvREFCNT_inc (coro_sv));	1295	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1015	++coro_nready;	1296	++coro_nready;
1016	UNLOCK;	1297	UNLOCK;
1017		1298
1018	return 1;	1299	return 1;
1019	}	1300	}
1020		1301
1021	static int	1302	static int
1022	api_is_ready (SV *coro_sv)	1303	api_is_ready (SV *coro_sv)
1023	{	1304	{
		1305	dTHX;
1024	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1306	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1025	}	1307	}
1026		1308
1027	static void	1309	static void
1028	prepare_schedule (struct transfer_args *ta)	1310	prepare_schedule (pTHX_ struct transfer_args *ta)
1029	{	1311	{
1030	SV *prev_sv, *next_sv;	1312	SV *prev_sv, *next_sv;
1031		1313
1032	for (;;)	1314	for (;;)
1033	{	1315	{
1034	LOCK;	1316	LOCK;
1035	next_sv = coro_deq (PRIO_MIN);	1317	next_sv = coro_deq (aTHX_ PRIO_MIN);
1036		1318
1037	/* nothing to schedule: call the idle handler */	1319	/* nothing to schedule: call the idle handler */
1038	if (!next_sv)	1320	if (expect_false (!next_sv))
1039	{	1321	{
1040	dSP;	1322	dSP;
1041	UNLOCK;	1323	UNLOCK;
1042		1324
1043	ENTER;	1325	ENTER;
…		…
1053	}	1335	}
1054		1336
1055	ta->next = SvSTATE (next_sv);	1337	ta->next = SvSTATE (next_sv);
1056		1338
1057	/* cannot transfer to destroyed coros, skip and look for next */	1339	/* cannot transfer to destroyed coros, skip and look for next */
1058	if (ta->next->flags & CF_DESTROYED)	1340	if (expect_false (ta->next->flags & CF_DESTROYED))
1059	{	1341	{
1060	UNLOCK;	1342	UNLOCK;
1061	SvREFCNT_dec (next_sv);	1343	SvREFCNT_dec (next_sv);
1062	/* coro_nready is already taken care of by destroy */	1344	/* coro_nready is already taken care of by destroy */
1063	continue;	1345	continue;
…		…
1068	break;	1350	break;
1069	}	1351	}
1070		1352
1071	/* free this only after the transfer */	1353	/* free this only after the transfer */
1072	prev_sv = SvRV (coro_current);	1354	prev_sv = SvRV (coro_current);
1073	SvRV_set (coro_current, next_sv);
1074	ta->prev = SvSTATE (prev_sv);	1355	ta->prev = SvSTATE (prev_sv);
1075		1356	TRANSFER_CHECK (*ta);
1076	assert (ta->next->flags & CF_READY);	1357	assert (ta->next->flags & CF_READY);
1077	ta->next->flags &= ~CF_READY;	1358	ta->next->flags &= ~CF_READY;
		1359	SvRV_set (coro_current, next_sv);
1078		1360
1079	LOCK;	1361	LOCK;
1080	free_coro_mortal ();	1362	free_coro_mortal (aTHX);
1081	coro_mortal = prev_sv;	1363	coro_mortal = prev_sv;
1082	UNLOCK;	1364	UNLOCK;
1083	}	1365	}
1084		1366
1085	static void	1367	static void
1086	prepare_cede (struct transfer_args *ta)	1368	prepare_cede (pTHX_ struct transfer_args *ta)
1087	{	1369	{
1088	api_ready (coro_current);	1370	api_ready (coro_current);
1089	prepare_schedule (ta);	1371	prepare_schedule (aTHX_ ta);
1090	}	1372	}
1091		1373
1092	static int	1374	static int
1093	prepare_cede_notself (struct transfer_args *ta)	1375	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1094	{	1376	{
1095	if (coro_nready)	1377	if (coro_nready)
1096	{	1378	{
1097	SV *prev = SvRV (coro_current);	1379	SV *prev = SvRV (coro_current);
1098	prepare_schedule (ta);	1380	prepare_schedule (aTHX_ ta);
1099	api_ready (prev);	1381	api_ready (prev);
1100	return 1;	1382	return 1;
1101	}	1383	}
1102	else	1384	else
1103	return 0;	1385	return 0;
1104	}	1386	}
1105		1387
1106	static void	1388	static void
1107	api_schedule (void)	1389	api_schedule (void)
1108	{	1390	{
		1391	dTHX;
1109	struct transfer_args ta;	1392	struct transfer_args ta;
1110		1393
1111	prepare_schedule (&ta);	1394	prepare_schedule (aTHX_ &ta);
1112	TRANSFER (ta);	1395	TRANSFER (ta);
1113	}	1396	}
1114		1397
1115	static int	1398	static int
1116	api_cede (void)	1399	api_cede (void)
1117	{	1400	{
		1401	dTHX;
1118	struct transfer_args ta;	1402	struct transfer_args ta;
1119		1403
1120	prepare_cede (&ta);	1404	prepare_cede (aTHX_ &ta);
1121		1405
1122	if (ta.prev != ta.next)	1406	if (expect_true (ta.prev != ta.next))
1123	{	1407	{
1124	TRANSFER (ta);	1408	TRANSFER (ta);
1125	return 1;	1409	return 1;
1126	}	1410	}
1127	else	1411	else
…		…
1129	}	1413	}
1130		1414
1131	static int	1415	static int
1132	api_cede_notself (void)	1416	api_cede_notself (void)
1133	{	1417	{
		1418	dTHX;
1134	struct transfer_args ta;	1419	struct transfer_args ta;
1135		1420
1136	if (prepare_cede_notself (&ta))	1421	if (prepare_cede_notself (aTHX_ &ta))
1137	{	1422	{
1138	TRANSFER (ta);	1423	TRANSFER (ta);
1139	return 1;	1424	return 1;
1140	}	1425	}
1141	else	1426	else
1142	return 0;	1427	return 0;
1143	}	1428	}
1144		1429
		1430	static void
		1431	api_trace (SV *coro_sv, int flags)
		1432	{
		1433	dTHX;
		1434	struct coro *coro = SvSTATE (coro_sv);
		1435
		1436	if (flags & CC_TRACE)
		1437	{
		1438	if (!coro->cctx)
		1439	coro->cctx = cctx_new ();
		1440	else if (!(coro->cctx->flags & CC_TRACE))
		1441	croak ("cannot enable tracing on coroutine with custom stack");
		1442
		1443	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1444	}
		1445	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1446	{
		1447	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1448
		1449	if (coro->flags & CF_RUNNING)
		1450	PL_runops = RUNOPS_DEFAULT;
		1451	else
		1452	coro->slot->runops = RUNOPS_DEFAULT;
		1453	}
		1454	}
		1455
1145	MODULE = Coro::State PACKAGE = Coro::State	1456	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1146		1457
1147	PROTOTYPES: DISABLE	1458	PROTOTYPES: DISABLE
1148		1459
1149	BOOT:	1460	BOOT:
1150	{	1461	{
1151	#ifdef USE_ITHREADS	1462	#ifdef USE_ITHREADS
1152	MUTEX_INIT (&coro_mutex);	1463	MUTEX_INIT (&coro_mutex);
1153	#endif	1464	#endif
1154	BOOT_PAGESIZE;	1465	BOOT_PAGESIZE;
1155		1466
		1467	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1468	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1469
1156	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1470	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1157		1471
		1472	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1473	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1158	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1474	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1159	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1160	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1161	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1162	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1475	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1163		1476
1164	main_mainstack = PL_mainstack;	1477	main_mainstack = PL_mainstack;
		1478	main_top_env = PL_top_env;
		1479
		1480	while (main_top_env->je_prev)
		1481	main_top_env = main_top_env->je_prev;
1165		1482
1166	coroapi.ver = CORO_API_VERSION;	1483	coroapi.ver = CORO_API_VERSION;
1167	coroapi.transfer = api_transfer;	1484	coroapi.transfer = api_transfer;
1168		1485
1169	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1486	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1176	struct coro *coro;	1493	struct coro *coro;
1177	HV *hv;	1494	HV *hv;
1178	int i;	1495	int i;
1179		1496
1180	Newz (0, coro, 1, struct coro);	1497	Newz (0, coro, 1, struct coro);
1181	coro->args = newAV ();	1498	coro->args = newAV ();
1182	coro->save = CORO_SAVE_ALL;
1183	coro->flags = CF_NEW;	1499	coro->flags = CF_NEW;
1184		1500
		1501	if (coro_first) coro_first->prev = coro;
		1502	coro->next = coro_first;
		1503	coro_first = coro;
		1504
1185	hv = newHV ();	1505	coro->hv = hv = newHV ();
1186	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1506	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1187	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1507	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1188		1508
		1509	av_extend (coro->args, items - 1);
1189	for (i = 1; i < items; i++)	1510	for (i = 1; i < items; i++)
1190	av_push (coro->args, newSVsv (ST (i)));	1511	av_push (coro->args, newSVsv (ST (i)));
1191	}	1512	}
1192	OUTPUT:	1513	OUTPUT:
1193	RETVAL	1514	RETVAL
1194		1515
1195	int	1516	# these not obviously related functions are all rolled into the same xs
1196	save (SV *coro, int new_save = -1)	1517	# function to increase chances that they all will call transfer with the same
1197	CODE:	1518	# stack offset
1198	RETVAL = api_save (coro, new_save);
1199	OUTPUT:
1200	RETVAL
1201
1202	void	1519	void
1203	_set_stacklevel (...)	1520	_set_stacklevel (...)
1204	ALIAS:	1521	ALIAS:
1205	Coro::State::transfer = 1	1522	Coro::State::transfer = 1
1206	Coro::schedule = 2	1523	Coro::schedule = 2
…		…
1219		1536
1220	case 1:	1537	case 1:
1221	if (items != 2)	1538	if (items != 2)
1222	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1539	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1223		1540
1224	prepare_transfer (&ta, ST (0), ST (1));	1541	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1225	break;	1542	break;
1226		1543
1227	case 2:	1544	case 2:
1228	prepare_schedule (&ta);	1545	prepare_schedule (aTHX_ &ta);
1229	break;	1546	break;
1230		1547
1231	case 3:	1548	case 3:
1232	prepare_cede (&ta);	1549	prepare_cede (aTHX_ &ta);
1233	break;	1550	break;
1234		1551
1235	case 4:	1552	case 4:
1236	if (!prepare_cede_notself (&ta))	1553	if (!prepare_cede_notself (aTHX_ &ta))
1237	XSRETURN_EMPTY;	1554	XSRETURN_EMPTY;
1238		1555
1239	break;	1556	break;
1240	}	1557	}
1241		1558
1242	BARRIER;	1559	BARRIER;
1243	TRANSFER (ta);	1560	TRANSFER (ta);
1244		1561
1245	if (GIMME_V != G_VOID && ta.next != ta.prev)	1562	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1246	XSRETURN_YES;	1563	XSRETURN_YES;
1247	}	1564	}
1248		1565
1249	bool	1566	bool
1250	_destroy (SV *coro_sv)	1567	_destroy (SV *coro_sv)
1251	CODE:	1568	CODE:
1252	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1569	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1253	OUTPUT:	1570	OUTPUT:
1254	RETVAL	1571	RETVAL
1255		1572
1256	void	1573	void
1257	_exit (code)	1574	_exit (code)
…		…
1259	PROTOTYPE: $	1576	PROTOTYPE: $
1260	CODE:	1577	CODE:
1261	_exit (code);	1578	_exit (code);
1262		1579
1263	int	1580	int
		1581	cctx_stacksize (int new_stacksize = 0)
		1582	CODE:
		1583	RETVAL = coro_stacksize;
		1584	if (new_stacksize)
		1585	coro_stacksize = new_stacksize;
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	int
1264	cctx_count ()	1590	cctx_count ()
1265	CODE:	1591	CODE:
1266	RETVAL = cctx_count;	1592	RETVAL = cctx_count;
1267	OUTPUT:	1593	OUTPUT:
1268	RETVAL	1594	RETVAL
…		…
1272	CODE:	1598	CODE:
1273	RETVAL = cctx_idle;	1599	RETVAL = cctx_idle;
1274	OUTPUT:	1600	OUTPUT:
1275	RETVAL	1601	RETVAL
1276		1602
		1603	void
		1604	list ()
		1605	PPCODE:
		1606	{
		1607	struct coro *coro;
		1608	for (coro = coro_first; coro; coro = coro->next)
		1609	if (coro->hv)
		1610	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1611	}
		1612
		1613	void
		1614	call (Coro::State coro, SV *coderef)
		1615	ALIAS:
		1616	eval = 1
		1617	CODE:
		1618	{
		1619	if (coro->mainstack)
		1620	{
		1621	struct coro temp;
		1622
		1623	if (!(coro->flags & CF_RUNNING))
		1624	{
		1625	save_perl (aTHX_ &temp);
		1626	load_perl (aTHX_ coro);
		1627	}
		1628
		1629	{
		1630	dSP;
		1631	ENTER;
		1632	SAVETMPS;
		1633	PUSHMARK (SP);
		1634	PUTBACK;
		1635
		1636	if (ix)
		1637	eval_sv (coderef, 0);
		1638	else
		1639	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1640
		1641	SPAGAIN;
		1642	FREETMPS;
		1643	LEAVE;
		1644	PUTBACK;
		1645	}
		1646
		1647	if (!(coro->flags & CF_RUNNING))
		1648	{
		1649	save_perl (aTHX_ coro);
		1650	load_perl (aTHX_ &temp);
		1651	}
		1652	}
		1653	}
		1654
		1655	SV *
		1656	is_ready (Coro::State coro)
		1657	PROTOTYPE: $
		1658	ALIAS:
		1659	is_ready = CF_READY
		1660	is_running = CF_RUNNING
		1661	is_new = CF_NEW
		1662	is_destroyed = CF_DESTROYED
		1663	CODE:
		1664	RETVAL = boolSV (coro->flags & ix);
		1665	OUTPUT:
		1666	RETVAL
		1667
		1668	void
		1669	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1670
		1671	SV *
		1672	has_stack (Coro::State coro)
		1673	PROTOTYPE: $
		1674	CODE:
		1675	RETVAL = boolSV (!!coro->cctx);
		1676	OUTPUT:
		1677	RETVAL
		1678
		1679	int
		1680	is_traced (Coro::State coro)
		1681	PROTOTYPE: $
		1682	CODE:
		1683	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1684	OUTPUT:
		1685	RETVAL
		1686
		1687	IV
		1688	rss (Coro::State coro)
		1689	PROTOTYPE: $
		1690	ALIAS:
		1691	usecount = 1
		1692	CODE:
		1693	switch (ix)
		1694	{
		1695	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1696	case 1: RETVAL = coro->usecount; break;
		1697	}
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701
1277	MODULE = Coro::State PACKAGE = Coro	1702	MODULE = Coro::State PACKAGE = Coro
1278		1703
1279	BOOT:	1704	BOOT:
1280	{	1705	{
1281	int i;	1706	int i;
1282		1707
		1708	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1709	get_sv ("Coro::POOL_RSS" , TRUE); /* silence stupid 5.10 warning */
		1710	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1711	get_sv ("Coro::POOL_SIZE" , TRUE); /* silence stupid 5.10 warning */
		1712	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1713	get_av ("Coro::async_pool", TRUE); /* silence stupid 5.10 warning */
		1714
		1715	coro_current = get_sv ("Coro::current", FALSE);
		1716	SvREADONLY_on (coro_current);
		1717
1283	coro_stash = gv_stashpv ("Coro", TRUE);	1718	coro_stash = gv_stashpv ("Coro", TRUE);
1284		1719
1285	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1720	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1286	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1721	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1287	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1722	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1288	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1723	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1289	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1724	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1290	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1725	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1291		1726
1292	coro_current = get_sv ("Coro::current", FALSE);
1293	SvREADONLY_on (coro_current);
1294
1295	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1727	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1296	coro_ready[i] = newAV ();	1728	coro_ready[i] = newAV ();
1297		1729
1298	{	1730	{
1299	SV *sv = perl_get_sv("Coro::API", 1);	1731	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1732	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1300		1733
1301	coroapi.schedule = api_schedule;	1734	coroapi.schedule = api_schedule;
1302	coroapi.save = api_save;
1303	coroapi.cede = api_cede;	1735	coroapi.cede = api_cede;
1304	coroapi.cede_notself = api_cede_notself;	1736	coroapi.cede_notself = api_cede_notself;
1305	coroapi.ready = api_ready;	1737	coroapi.ready = api_ready;
1306	coroapi.is_ready = api_is_ready;	1738	coroapi.is_ready = api_is_ready;
1307	coroapi.nready = &coro_nready;	1739	coroapi.nready = &coro_nready;
…		…
1348	CODE:	1780	CODE:
1349	RETVAL = boolSV (api_ready (self));	1781	RETVAL = boolSV (api_ready (self));
1350	OUTPUT:	1782	OUTPUT:
1351	RETVAL	1783	RETVAL
1352		1784
1353	SV *
1354	is_ready (SV *self)
1355	PROTOTYPE: $
1356	CODE:
1357	RETVAL = boolSV (api_is_ready (self));
1358	OUTPUT:
1359	RETVAL
1360
1361	int	1785	int
1362	nready (...)	1786	nready (...)
1363	PROTOTYPE:	1787	PROTOTYPE:
1364	CODE:	1788	CODE:
1365	RETVAL = coro_nready;	1789	RETVAL = coro_nready;
1366	OUTPUT:	1790	OUTPUT:
1367	RETVAL	1791	RETVAL
1368		1792
		1793	void
		1794	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1795	PROTOTYPE: $;$
		1796	CODE:
		1797	SvREFCNT_dec (self->throw);
		1798	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1799
		1800	# for async_pool speedup
		1801	void
		1802	_pool_1 (SV *cb)
		1803	CODE:
		1804	{
		1805	struct coro *coro = SvSTATE (coro_current);
		1806	HV *hv = (HV *)SvRV (coro_current);
		1807	AV *defav = GvAV (PL_defgv);
		1808	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1809	AV *invoke_av;
		1810	int i, len;
		1811
		1812	if (!invoke)
		1813	croak ("\3async_pool terminate\2\n");
		1814
		1815	SvREFCNT_dec (coro->saved_deffh);
		1816	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1817
		1818	hv_store (hv, "desc", sizeof ("desc") - 1,
		1819	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1820
		1821	invoke_av = (AV *)SvRV (invoke);
		1822	len = av_len (invoke_av);
		1823
		1824	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1825
		1826	if (len > 0)
		1827	{
		1828	av_fill (defav, len - 1);
		1829	for (i = 0; i < len; ++i)
		1830	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1831	}
		1832
		1833	SvREFCNT_dec (invoke);
		1834	}
		1835
		1836	void
		1837	_pool_2 (SV *cb)
		1838	CODE:
		1839	{
		1840	struct coro *coro = SvSTATE (coro_current);
		1841
		1842	sv_setsv (cb, &PL_sv_undef);
		1843
		1844	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1845	coro->saved_deffh = 0;
		1846
		1847	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1848	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1849	croak ("\3async_pool terminate\2\n");
		1850
		1851	av_clear (GvAV (PL_defgv));
		1852	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1853	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1854
		1855	coro->prio = 0;
		1856
		1857	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1858	api_trace (coro_current, 0);
		1859
		1860	av_push (av_async_pool, newSVsv (coro_current));
		1861	}
		1862
		1863
1369	MODULE = Coro::State PACKAGE = Coro::AIO	1864	MODULE = Coro::State PACKAGE = Coro::AIO
1370		1865
1371	SV *	1866	SV *
1372	_get_state ()	1867	_get_state ()
1373	CODE:	1868	CODE:

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