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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.130 by root, Mon Dec 25 13:25:55 2006 UTC vs.
Revision 1.198 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>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
38	#endif	44	#endif
39		45
40	/* the maximum number of idle cctx that will be pooled */	46	/* the maximum number of idle cctx that will be pooled */
41	#define MAX_IDLE_CCTX 8	47	#define MAX_IDLE_CCTX 8
42		48
…		…
70	/* 5.8.7 */	76	/* 5.8.7 */
71	#ifndef SvRV_set	77	#ifndef SvRV_set
72	# define SvRV_set(s,v) SvRV(s) = (v)	78	# define SvRV_set(s,v) SvRV(s) = (v)
73	#endif	79	#endif
74		80
		81	/* 5.8.8 */
		82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
		88
75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76	# undef STACKGUARD	90	# undef CORO_STACKGUARD
77	#endif	91	#endif
78		92
79	#ifndef STACKGUARD	93	#ifndef CORO_STACKGUARD
80	# define STACKGUARD 0	94	# define CORO_STACKGUARD 0
81	#endif	95	#endif
82		96
83	/* prefer perl internal functions over our own? */	97	/* prefer perl internal functions over our own? */
84	#ifndef PREFER_PERL_FUNCTIONS	98	#ifndef CORO_PREFER_PERL_FUNCTIONS
85	# define PREFER_PERL_FUNCTIONS 0	99	# define CORO_PREFER_PERL_FUNCTIONS 0
86	#endif	100	#endif
87		101
88	/* The next macro should declare a variable stacklevel that contains and approximation	102	/* The next macros try to return the current stack pointer, in an as
89	* to the current C stack pointer. Its property is that it changes with each call	103	* portable way as possible. */
90	* and should be unique. */
91	#define dSTACKLEVEL int stacklevel	104	#define dSTACKLEVEL volatile char stacklevel
92	#define STACKLEVEL ((void *)&stacklevel)	105	#define STACKLEVEL ((void *)&stacklevel)
93		106
94	#define IN_DESTRUCT (PL_main_cv == Nullcv)	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
95		108
96	#if __GNUC__ >= 3	109	#if __GNUC__ >= 3
97	# define attribute(x) __attribute__(x)	110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
98	#else	113	#else
99	# define attribute(x)	114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
100	#endif	117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
101		121
102	#define NOINLINE attribute ((noinline))	122	#define NOINLINE attribute ((noinline))
103		123
104	#include "CoroAPI.h"	124	#include "CoroAPI.h"
105		125
…		…
110	#else	130	#else
111	# define LOCK (void)0	131	# define LOCK (void)0
112	# define UNLOCK (void)0	132	# define UNLOCK (void)0
113	#endif	133	#endif
114		134
		135	/* helper storage struct for Coro::AIO */
115	struct io_state	136	struct io_state
116	{	137	{
117	int errorno;	138	int errorno;
118	I32 laststype;	139	I32 laststype;
119	int laststatval;	140	int laststatval;
120	Stat_t statcache;	141	Stat_t statcache;
121	};	142	};
122		143
		144	static size_t coro_stacksize = CORO_STACKSIZE;
123	static struct CoroAPI coroapi;	145	static struct CoroAPI coroapi;
124	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;
125	static HV *coro_state_stash, *coro_stash;	148	static HV *coro_state_stash, *coro_stash;
126	static SV *coro_mortal; /* will be freed after next transfer */	149	static SV *coro_mortal; /* will be freed after next transfer */
127		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
128	static struct coro_cctx *cctx_first;	159	static struct coro_cctx *cctx_first;
129	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	};
130		170
131	/* this is a structure representing a c-level coroutine */	171	/* this is a structure representing a c-level coroutine */
132	typedef struct coro_cctx {	172	typedef struct coro_cctx {
133	struct coro_cctx *next;	173	struct coro_cctx *next;
134		174
135	/* the stack */	175	/* the stack */
136	void *sptr;	176	void *sptr;
137	long ssize; /* positive == mmap, otherwise malloc */	177	size_t ssize;
138		178
139	/* cpu state */	179	/* cpu state */
140	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	180	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		181	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
141	JMPENV *top_env;	182	JMPENV *top_env;
142	coro_context cctx;	183	coro_context cctx;
143		184
144	int inuse;
145
146	#if USE_VALGRIND	185	#if CORO_USE_VALGRIND
147	int valgrind_id;	186	int valgrind_id;
148	#endif	187	#endif
		188	unsigned char flags;
149	} coro_cctx;	189	} coro_cctx;
150		190
151	enum {	191	enum {
152	CF_RUNNING = 0x0001, /* coroutine is running */	192	CF_RUNNING = 0x0001, /* coroutine is running */
153	CF_READY = 0x0002, /* coroutine is ready */	193	CF_READY = 0x0002, /* coroutine is ready */
154	CF_NEW = 0x0004, /* ahs never been switched to */	194	CF_NEW = 0x0004, /* has never been switched to */
		195	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
155	};	196	};
		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))
156		210
157	/* this is a structure representing a perl-level coroutine */	211	/* this is a structure representing a perl-level coroutine */
158	struct coro {	212	struct coro {
159	/* the c coroutine allocated to this perl coroutine, if any */	213	/* the c coroutine allocated to this perl coroutine, if any */
160	coro_cctx *cctx;	214	coro_cctx *cctx;
161		215
		216	/* process data */
		217	AV *mainstack;
		218	perl_slots *slot; /* basically the saved sp */
		219
162	/* data associated with this coroutine (initial args) */	220	/* data associated with this coroutine (initial args) */
163	AV *args;	221	AV *args;
164	int refcnt;	222	int refcnt;
165	int save; /* CORO_SAVE flags */
166	int flags; /* CF_ flags */	223	int flags; /* CF_ flags */
167		224
168	/* optionally saved, might be zero */	225	/* statistics */
169	AV *defav; /* @_ */	226	int usecount; /* number of transfers to this coro */
170	SV *defsv; /* $_ */
171	SV *errsv; /* $@ */
172	SV *irssv; /* $/ */
173	SV *irssv_sv; /* real $/ cache */
174
175	#define VAR(name,type) type name;
176	# include "state.h"
177	#undef VAR
178		227
179	/* coro process data */	228	/* coro process data */
180	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 */
181	};	238	};
182		239
183	typedef struct coro *Coro__State;	240	typedef struct coro *Coro__State;
184	typedef struct coro *Coro__State_or_hashref;	241	typedef struct coro *Coro__State_or_hashref;
185		242
		243	/** Coro ********************************************************************/
		244
		245	#define PRIO_MAX 3
		246	#define PRIO_HIGH 1
		247	#define PRIO_NORMAL 0
		248	#define PRIO_LOW -1
		249	#define PRIO_IDLE -3
		250	#define PRIO_MIN -4
		251
		252	/* for Coro.pm */
		253	static SV *coro_current;
		254	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		255	static int coro_nready;
		256	static struct coro *coro_first;
		257
		258	/** lowlevel stuff **********************************************************/
		259
186	static AV *	260	static AV *
187	coro_clone_padlist (CV *cv)	261	coro_clone_padlist (pTHX_ CV *cv)
188	{	262	{
189	AV *padlist = CvPADLIST (cv);	263	AV *padlist = CvPADLIST (cv);
190	AV *newpadlist, *newpad;	264	AV *newpadlist, *newpad;
191		265
192	newpadlist = newAV ();	266	newpadlist = newAV ();
…		…
204		278
205	return newpadlist;	279	return newpadlist;
206	}	280	}
207		281
208	static void	282	static void
209	free_padlist (AV *padlist)	283	free_padlist (pTHX_ AV *padlist)
210	{	284	{
211	/* may be during global destruction */	285	/* may be during global destruction */
212	if (SvREFCNT (padlist))	286	if (SvREFCNT (padlist))
213	{	287	{
214	I32 i = AvFILLp (padlist);	288	I32 i = AvFILLp (padlist);
…		…
235	AV *padlist;	309	AV *padlist;
236	AV *av = (AV *)mg->mg_obj;	310	AV *av = (AV *)mg->mg_obj;
237		311
238	/* casting is fun. */	312	/* casting is fun. */
239	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	313	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
240	free_padlist (padlist);	314	free_padlist (aTHX_ padlist);
241		315
242	SvREFCNT_dec (av);	316	SvREFCNT_dec (av);
243		317
244	return 0;	318	return 0;
245	}	319	}
…		…
253	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	327	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
254	? SvMAGIC (cv) \	328	? SvMAGIC (cv) \
255	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	329	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
256	: 0	330	: 0
257		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
258	/* the next two functions merely cache the padlists */	358	/* the next two functions merely cache the padlists */
259	static void	359	static void
260	get_padlist (CV *cv)	360	get_padlist (pTHX_ CV *cv)
261	{	361	{
262	MAGIC *mg = CORO_MAGIC (cv);	362	MAGIC *mg = CORO_MAGIC (cv);
263	AV *av;	363	AV *av;
264		364
265	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	365	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
266	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	366	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
267	else	367	else
268	{	368	{
269	#if PREFER_PERL_FUNCTIONS	369	#if CORO_PREFER_PERL_FUNCTIONS
270	/* this is probably cleaner, but also slower? */	370	/* this is probably cleaner, but also slower? */
271	CV *cp = Perl_cv_clone (cv);	371	CV *cp = Perl_cv_clone (cv);
272	CvPADLIST (cv) = CvPADLIST (cp);	372	CvPADLIST (cv) = CvPADLIST (cp);
273	CvPADLIST (cp) = 0;	373	CvPADLIST (cp) = 0;
274	SvREFCNT_dec (cp);	374	SvREFCNT_dec (cp);
275	#else	375	#else
276	CvPADLIST (cv) = coro_clone_padlist (cv);	376	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
277	#endif	377	#endif
278	}	378	}
279	}	379	}
280		380
281	static void	381	static void
282	put_padlist (CV *cv)	382	put_padlist (pTHX_ CV *cv)
283	{	383	{
284	MAGIC *mg = CORO_MAGIC (cv);	384	MAGIC *mg = CORO_MAGIC (cv);
285	AV *av;	385	AV *av;
286		386
287	if (!mg)	387	if (expect_false (!mg))
288	{	388	{
289	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	389	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
290	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	390	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
291	mg->mg_virtual = &vtbl_coro;	391	mg->mg_virtual = &vtbl_coro;
292	mg->mg_obj = (SV *)newAV ();	392	mg->mg_obj = (SV *)newAV ();
293	}	393	}
294		394
295	av = (AV *)mg->mg_obj;	395	av = (AV *)mg->mg_obj;
296		396
297	if (AvFILLp (av) >= AvMAX (av))	397	if (expect_false (AvFILLp (av) >= AvMAX (av)))
298	av_extend (av, AvMAX (av) + 1);	398	av_extend (av, AvMAX (av) + 1);
299		399
300	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	400	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
301	}	401	}
302		402
303	#define SB do {	403	/** load & save, init *******************************************************/
304	#define SE } while (0)
305		404
306	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
307
308	static void	405	static void
309	load_perl (Coro__State c)	406	load_perl (pTHX_ Coro__State c)
310	{	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
311	#define VAR(name,type) PL_ ## name = c->name;	418	#define VAR(name,type) PL_ ## name = slot->name;
312	# include "state.h"	419	# include "state.h"
313	#undef VAR	420	#undef VAR
314
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318	if (c->irssv)
319	{
320	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
321	SvREFCNT_dec (c->irssv);
322	else
323	{
324	REPLACE_SV (PL_rs, c->irssv);
325	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
326	sv_setsv (c->irssv_sv, PL_rs);
327	}
328	}
329		421
330	{	422	{
331	dSP;	423	dSP;
		424
332	CV *cv;	425	CV *cv;
333		426
334	/* now do the ugly restore mess */	427	/* now do the ugly restore mess */
335	while ((cv = (CV *)POPs))	428	while (expect_true (cv = (CV *)POPs))
336	{	429	{
337	put_padlist (cv); /* mark this padlist as available */	430	put_padlist (aTHX_ cv); /* mark this padlist as available */
338	CvDEPTH (cv) = PTR2IV (POPs);	431	CvDEPTH (cv) = PTR2IV (POPs);
339	CvPADLIST (cv) = (AV *)POPs;	432	CvPADLIST (cv) = (AV *)POPs;
340	}	433	}
341		434
342	PUTBACK;	435	PUTBACK;
343	}	436	}
344	}	437	}
345		438
346	static void	439	static void
347	save_perl (Coro__State c)	440	save_perl (pTHX_ Coro__State c)
348	{	441	{
349	{	442	{
350	dSP;	443	dSP;
351	I32 cxix = cxstack_ix;	444	I32 cxix = cxstack_ix;
352	PERL_CONTEXT *ccstk = cxstack;	445	PERL_CONTEXT *ccstk = cxstack;
…		…
355	/*	448	/*
356	* 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
357	* (and reinitialize) all cv's in the whole callchain :(	450	* (and reinitialize) all cv's in the whole callchain :(
358	*/	451	*/
359		452
360	EXTEND (SP, 3 + 1);
361	PUSHs (Nullsv);	453	XPUSHs (Nullsv);
362	/* this loop was inspired by pp_caller */	454	/* this loop was inspired by pp_caller */
363	for (;;)	455	for (;;)
364	{	456	{
365	while (cxix >= 0)	457	while (expect_true (cxix >= 0))
366	{	458	{
367	PERL_CONTEXT *cx = &ccstk[cxix--];	459	PERL_CONTEXT *cx = &ccstk[cxix--];
368		460
369	if (CxTYPE (cx) == CXt_SUB)	461	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
370	{	462	{
371	CV *cv = cx->blk_sub.cv;	463	CV *cv = cx->blk_sub.cv;
372		464
373	if (CvDEPTH (cv))	465	if (expect_true (CvDEPTH (cv)))
374	{	466	{
375	EXTEND (SP, 3);	467	EXTEND (SP, 3);
376	PUSHs ((SV *)CvPADLIST (cv));	468	PUSHs ((SV *)CvPADLIST (cv));
377	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	469	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
378	PUSHs ((SV *)cv);	470	PUSHs ((SV *)cv);
379		471
380	CvDEPTH (cv) = 0;	472	CvDEPTH (cv) = 0;
381	get_padlist (cv);	473	get_padlist (aTHX_ cv);
382	}	474	}
383	}	475	}
384	}	476	}
385		477
386	if (top_si->si_type == PERLSI_MAIN)	478	if (expect_true (top_si->si_type == PERLSI_MAIN))
387	break;	479	break;
388		480
389	top_si = top_si->si_prev;	481	top_si = top_si->si_prev;
390	ccstk = top_si->si_cxstack;	482	ccstk = top_si->si_cxstack;
391	cxix = top_si->si_cxix;	483	cxix = top_si->si_cxix;
392	}	484	}
393		485
394	PUTBACK;	486	PUTBACK;
395	}	487	}
396		488
397	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 */
398	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	490	{
399	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	491	/* we manually unroll here, as usually 2 slots is enough */
400	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;
401		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
402	#define VAR(name,type)c->name = PL_ ## name;	512	#define VAR(name,type) slot->name = PL_ ## name;
403	# include "state.h"	513	# include "state.h"
404	#undef VAR	514	#undef VAR
		515	}
405	}	516	}
406		517
407	/*	518	/*
408	* allocate various perl stacks. This is an exact copy	519	* allocate various perl stacks. This is an exact copy
409	* of perl.c:init_stacks, except that it uses less memory	520	* of perl.c:init_stacks, except that it uses less memory
410	* on the (sometimes correct) assumption that coroutines do	521	* on the (sometimes correct) assumption that coroutines do
411	* not usually need a lot of stackspace.	522	* not usually need a lot of stackspace.
412	*/	523	*/
413	#if PREFER_PERL_FUNCTIONS	524	#if CORO_PREFER_PERL_FUNCTIONS
414	# define coro_init_stacks init_stacks	525	# define coro_init_stacks init_stacks
415	#else	526	#else
416	static void	527	static void
417	coro_init_stacks ()	528	coro_init_stacks (pTHX)
418	{	529	{
419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	530	PL_curstackinfo = new_stackinfo(32, 8);
420	PL_curstackinfo->si_type = PERLSI_MAIN;	531	PL_curstackinfo->si_type = PERLSI_MAIN;
421	PL_curstack = PL_curstackinfo->si_stack;	532	PL_curstack = PL_curstackinfo->si_stack;
422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	533	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
423		534
424	PL_stack_base = AvARRAY(PL_curstack);	535	PL_stack_base = AvARRAY(PL_curstack);
425	PL_stack_sp = PL_stack_base;	536	PL_stack_sp = PL_stack_base;
426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	537	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
427		538
428	New(50,PL_tmps_stack,128,SV*);	539	New(50,PL_tmps_stack,32,SV*);
429	PL_tmps_floor = -1;	540	PL_tmps_floor = -1;
430	PL_tmps_ix = -1;	541	PL_tmps_ix = -1;
431	PL_tmps_max = 128;	542	PL_tmps_max = 32;
432		543
433	New(54,PL_markstack,32,I32);	544	New(54,PL_markstack,16,I32);
434	PL_markstack_ptr = PL_markstack;	545	PL_markstack_ptr = PL_markstack;
435	PL_markstack_max = PL_markstack + 32;	546	PL_markstack_max = PL_markstack + 16;
436		547
437	#ifdef SET_MARK_OFFSET	548	#ifdef SET_MARK_OFFSET
438	SET_MARK_OFFSET;	549	SET_MARK_OFFSET;
439	#endif	550	#endif
440		551
441	New(54,PL_scopestack,32,I32);	552	New(54,PL_scopestack,8,I32);
442	PL_scopestack_ix = 0;	553	PL_scopestack_ix = 0;
443	PL_scopestack_max = 32;	554	PL_scopestack_max = 8;
444		555
445	New(54,PL_savestack,64,ANY);	556	New(54,PL_savestack,24,ANY);
446	PL_savestack_ix = 0;	557	PL_savestack_ix = 0;
447	PL_savestack_max = 64;	558	PL_savestack_max = 24;
448		559
449	#if !PERL_VERSION_ATLEAST (5,9,0)	560	#if !PERL_VERSION_ATLEAST (5,9,0)
450	New(54,PL_retstack,16,OP*);	561	New(54,PL_retstack,4,OP*);
451	PL_retstack_ix = 0;	562	PL_retstack_ix = 0;
452	PL_retstack_max = 16;	563	PL_retstack_max = 4;
453	#endif	564	#endif
454	}	565	}
455	#endif	566	#endif
456		567
457	/*	568	/*
458	* destroy the stacks, the callchain etc...	569	* destroy the stacks, the callchain etc...
459	*/	570	*/
460	static void	571	static void
461	coro_destroy_stacks ()	572	coro_destroy_stacks (pTHX)
462	{	573	{
463	if (!IN_DESTRUCT)
464	{
465	/* restore all saved variables and stuff */
466	LEAVE_SCOPE (0);
467	assert (PL_tmps_floor == -1);
468
469	/* free all temporaries */
470	FREETMPS;
471	assert (PL_tmps_ix == -1);
472
473	POPSTACK_TO (PL_mainstack);
474	}
475
476	while (PL_curstackinfo->si_next)	574	while (PL_curstackinfo->si_next)
477	PL_curstackinfo = PL_curstackinfo->si_next;	575	PL_curstackinfo = PL_curstackinfo->si_next;
478		576
479	while (PL_curstackinfo)	577	while (PL_curstackinfo)
480	{	578	{
…		…
495	#if !PERL_VERSION_ATLEAST (5,9,0)	593	#if !PERL_VERSION_ATLEAST (5,9,0)
496	Safefree (PL_retstack);	594	Safefree (PL_retstack);
497	#endif	595	#endif
498	}	596	}
499		597
500	static void	598	static size_t
501	setup_coro (struct coro *coro)	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
		635	/** coroutine stack handling ************************************************/
		636
		637	static void
		638	coro_setup (pTHX_ struct coro *coro)
502	{	639	{
503	/*	640	/*
504	* emulate part of the perl startup here.	641	* emulate part of the perl startup here.
505	*/	642	*/
506
507	coro_init_stacks ();	643	coro_init_stacks (aTHX);
508		644
		645	PL_runops = RUNOPS_DEFAULT;
509	PL_curcop = &PL_compiling;	646	PL_curcop = &PL_compiling;
510	PL_in_eval = EVAL_NULL;	647	PL_in_eval = EVAL_NULL;
		648	PL_comppad = 0;
511	PL_curpm = 0;	649	PL_curpm = 0;
		650	PL_curpad = 0;
512	PL_localizing = 0;	651	PL_localizing = 0;
513	PL_dirty = 0;	652	PL_dirty = 0;
514	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);
515		663
516	{	664	{
517	dSP;	665	dSP;
518	LOGOP myop;	666	LOGOP myop;
519		667
520	SvREFCNT_dec (GvAV (PL_defgv));
521	GvAV (PL_defgv) = coro->args; coro->args = 0;
522
523	Zero (&myop, 1, LOGOP);	668	Zero (&myop, 1, LOGOP);
524	myop.op_next = Nullop;	669	myop.op_next = Nullop;
525	myop.op_flags = OPf_WANT_VOID;	670	myop.op_flags = OPf_WANT_VOID;
526		671
527	PUSHMARK (SP);	672	PUSHMARK (SP);
528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	673	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
529	PUTBACK;	674	PUTBACK;
530	PL_op = (OP *)&myop;	675	PL_op = (OP *)&myop;
531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	676	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
532	SPAGAIN;	677	SPAGAIN;
533	}	678	}
534		679
535	ENTER; /* necessary e.g. for dounwind */	680	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
536	}	681	}
537		682
538	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
539	free_coro_mortal ()	720	free_coro_mortal (pTHX)
540	{	721	{
541	if (coro_mortal)	722	if (expect_true (coro_mortal))
542	{	723	{
543	SvREFCNT_dec (coro_mortal);	724	SvREFCNT_dec (coro_mortal);
544	coro_mortal = 0;	725	coro_mortal = 0;
545	}	726	}
546	}	727	}
547		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
548	/* 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 */
549	static void NOINLINE	856	static void NOINLINE
550	prepare_cctx (coro_cctx *cctx)	857	prepare_cctx (pTHX_ coro_cctx *cctx)
551	{	858	{
552	dSP;	859	dSP;
553	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;
554		866
555	Zero (&myop, 1, LOGOP);	867	Zero (&myop, 1, LOGOP);
556	myop.op_next = PL_op;	868	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	869	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		870
…		…
564	PL_op = (OP *)&myop;	876	PL_op = (OP *)&myop;
565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	877	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566	SPAGAIN;	878	SPAGAIN;
567	}	879	}
568		880
		881	/*
		882	* this is a _very_ stripped down perl interpreter ;)
		883	*/
569	static void	884	static void
570	coro_run (void *arg)	885	coro_run (void *arg)
571	{	886	{
		887	dTHX;
		888
572	/* coro_run is the alternative tail of transfer(), so unlock here. */	889	/* coro_run is the alternative tail of transfer(), so unlock here. */
573	UNLOCK;	890	UNLOCK;
574		891
575	/*	892	/* we now skip the entersub that lead to transfer() */
576	* this is a _very_ stripped down perl interpreter ;)	893	PL_op = PL_op->op_next;
577	*/
578	PL_top_env = &PL_start_env;
579		894
580	/* inject call to cctx_init */	895	/* inject a fake subroutine call to cctx_init */
581	prepare_cctx ((coro_cctx *)arg);	896	prepare_cctx (aTHX_ (coro_cctx *)arg);
582		897
583	/* 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 */
584	PL_restartop = PL_op;	899	PL_restartop = PL_op;
585	perl_run (PL_curinterp);	900	perl_run (PL_curinterp);
586		901
587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	902	/*
588	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 */
589	}	911	}
590		912
591	static coro_cctx *	913	static coro_cctx *
592	cctx_new ()	914	cctx_new ()
593	{	915	{
594	coro_cctx *cctx;	916	coro_cctx *cctx;
		917	void *stack_start;
		918	size_t stack_size;
595		919
596	++cctx_count;	920	++cctx_count;
597		921
598	Newz (0, cctx, 1, coro_cctx);	922	Newz (0, cctx, 1, coro_cctx);
599		923
600	#if HAVE_MMAP	924	#if HAVE_MMAP
601		925
602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	926	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
603	/* mmap supposedly does allocate-on-write for us */	927	/* mmap supposedly does allocate-on-write for us */
604	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	928	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605		929
606	if (cctx->sptr == (void *)-1)	930	if (cctx->sptr != (void *)-1)
607	{
608	perror ("FATAL: unable to mmap stack for coroutine");
609	_exit (EXIT_FAILURE);
610	}	931	{
611
612	# if STACKGUARD	932	# if CORO_STACKGUARD
613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	933	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
614	# endif	934	# endif
		935	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		936	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		937	cctx->flags |= CC_MAPPED;
		938	}
		939	else
		940	#endif
		941	{
		942	cctx->ssize = coro_stacksize * (long)sizeof (long);
		943	New (0, cctx->sptr, coro_stacksize, long);
615		944
616	#else
617
618	cctx->ssize = STACKSIZE * (long)sizeof (long);
619	New (0, cctx->sptr, STACKSIZE, long);
620
621	if (!cctx->sptr)	945	if (!cctx->sptr)
622	{	946	{
623	perror ("FATAL: unable to malloc stack for coroutine");	947	perror ("FATAL: unable to allocate stack for coroutine");
624	_exit (EXIT_FAILURE);	948	_exit (EXIT_FAILURE);
625	}	949	}
626		950
627	#endif	951	stack_start = cctx->sptr;
		952	stack_size = cctx->ssize;
		953	}
628		954
629	#if USE_VALGRIND	955	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
630	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
631	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
632	cctx->ssize + (char *)cctx->sptr
633	);
634	#endif
635
636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	956	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
637		957
638	return cctx;	958	return cctx;
639	}	959	}
640		960
641	static void	961	static void
…		…
644	if (!cctx)	964	if (!cctx)
645	return;	965	return;
646		966
647	--cctx_count;	967	--cctx_count;
648		968
649	#if USE_VALGRIND	969	#if CORO_USE_VALGRIND
650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	970	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
651	#endif	971	#endif
652		972
653	#if HAVE_MMAP	973	#if HAVE_MMAP
		974	if (cctx->flags & CC_MAPPED)
654	munmap (cctx->sptr, cctx->ssize);	975	munmap (cctx->sptr, cctx->ssize);
655	#else	976	else
		977	#endif
656	Safefree (cctx->sptr);	978	Safefree (cctx->sptr);
657	#endif
658		979
659	Safefree (cctx);	980	Safefree (cctx);
660	}	981	}
661		982
		983	/* wether this cctx should be destructed */
		984	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		985
662	static coro_cctx *	986	static coro_cctx *
663	cctx_get ()	987	cctx_get (pTHX)
664	{	988	{
665	coro_cctx *cctx;	989	while (expect_true (cctx_first))
666
667	if (cctx_first)
668	{	990	{
669	cctx = cctx_first;	991	coro_cctx *cctx = cctx_first;
670	cctx_first = cctx->next;	992	cctx_first = cctx->next;
671	--cctx_idle;	993	--cctx_idle;
672	}	994
673	else	995	if (expect_true (!CCTX_EXPIRED (cctx)))
674	{	996	return cctx;
675	cctx = cctx_new ();	997
676	PL_op = PL_op->op_next;	998	cctx_destroy (cctx);
677	}	999	}
678		1000
679	return cctx;	1001	return cctx_new ();
680	}	1002	}
681		1003
682	static void	1004	static void
683	cctx_put (coro_cctx *cctx)	1005	cctx_put (coro_cctx *cctx)
684	{	1006	{
685	/* free another cctx if overlimit */	1007	/* free another cctx if overlimit */
686	if (cctx_idle >= MAX_IDLE_CCTX)	1008	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
687	{	1009	{
688	coro_cctx *first = cctx_first;	1010	coro_cctx *first = cctx_first;
689	cctx_first = first->next;	1011	cctx_first = first->next;
690	--cctx_idle;	1012	--cctx_idle;
691		1013
692	assert (!first->inuse);
693	cctx_destroy (first);	1014	cctx_destroy (first);
694	}	1015	}
695		1016
696	++cctx_idle;	1017	++cctx_idle;
697	cctx->next = cctx_first;	1018	cctx->next = cctx_first;
698	cctx_first = cctx;	1019	cctx_first = cctx;
699	}	1020	}
700		1021
701	/* never call directly, always through the coro_state_transfer global variable */	1022	/** coroutine switching *****************************************************/
		1023
		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 */
702	static void NOINLINE	1050	static void NOINLINE
703	transfer (struct coro *prev, struct coro *next)	1051	transfer (pTHX_ struct coro *prev, struct coro *next)
704	{	1052	{
705	dSTACKLEVEL;	1053	dSTACKLEVEL;
706		1054
707	/* sometimes transfer is only called to set idle_sp */	1055	/* sometimes transfer is only called to set idle_sp */
708	if (!next)	1056	if (expect_false (!next))
709	{	1057	{
710	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1058	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
711	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */	1059	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
712	}	1060	}
713	else if (prev != next)	1061	else if (expect_true (prev != next))
714	{	1062	{
715	coro_cctx *prev__cctx;	1063	coro_cctx *prev__cctx;
716		1064
717	if (prev->flags & CF_NEW)	1065	if (expect_false (prev->flags & CF_NEW))
718	{	1066	{
719	/* create a new empty context */	1067	/* create a new empty context */
720	Newz (0, prev->cctx, 1, coro_cctx);	1068	Newz (0, prev->cctx, 1, coro_cctx);
721	prev->cctx->inuse = 1;
722	prev->flags &= ~CF_NEW;	1069	prev->flags &= ~CF_NEW;
723	prev->flags |= CF_RUNNING;	1070	prev->flags |= CF_RUNNING;
724	}	1071	}
725		1072
726	/*TODO: must not croak here */
727	if (!prev->flags & CF_RUNNING)
728	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
729
730	if (next->flags & CF_RUNNING)
731	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
732
733	prev->flags &= ~CF_RUNNING;	1073	prev->flags &= ~CF_RUNNING;
734	next->flags |= CF_RUNNING;	1074	next->flags |= CF_RUNNING;
735		1075
736	LOCK;	1076	LOCK;
737		1077
738	if (next->flags & CF_NEW)	1078	if (expect_false (next->flags & CF_NEW))
739	{	1079	{
740	/* need to start coroutine */	1080	/* need to start coroutine */
741	next->flags &= ~CF_NEW;	1081	next->flags &= ~CF_NEW;
742	/* first get rid of the old state */	1082	/* first get rid of the old state */
743	save_perl (prev);	1083	save_perl (aTHX_ prev);
744	/* setup coroutine call */	1084	/* setup coroutine call */
745	setup_coro (next);	1085	coro_setup (aTHX_ next);
746	/* need a new stack */
747	assert (!next->cctx);
748	}	1086	}
749	else	1087	else
750	{	1088	{
751	/* coroutine already started */	1089	/* coroutine already started */
752	save_perl (prev);	1090	save_perl (aTHX_ prev);
753	load_perl (next);	1091	load_perl (aTHX_ next);
754	}	1092	}
755		1093
756	prev__cctx = prev->cctx;	1094	prev__cctx = prev->cctx;
757		1095
758	/* possibly "free" the cctx */	1096	/* possibly "free" the cctx */
759	if (prev__cctx->idle_sp == STACKLEVEL)	1097	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
760	{	1098	{
761	/* 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 */
762	assert (PL_top_env == prev__cctx->top_env);	1100	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
763		1101
764	prev->cctx = 0;	1102	prev->cctx = 0;
765		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
766	cctx_put (prev__cctx);	1109	cctx_put (prev__cctx);
767	prev__cctx->inuse = 0;
768	}	1110	}
769		1111
		1112	++next->usecount;
		1113
770	if (!next->cctx)	1114	if (expect_true (!next->cctx))
771	{
772	next->cctx = cctx_get ();	1115	next->cctx = cctx_get (aTHX);
773	assert (!next->cctx->inuse);
774	next->cctx->inuse = 1;
775	}
776		1116
777	if (prev__cctx != next->cctx)	1117	if (expect_false (prev__cctx != next->cctx))
778	{	1118	{
779	prev__cctx->top_env = PL_top_env;	1119	prev__cctx->top_env = PL_top_env;
780	PL_top_env = next->cctx->top_env;	1120	PL_top_env = next->cctx->top_env;
781	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1121	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
782	}	1122	}
783		1123
784	free_coro_mortal ();	1124	free_coro_mortal (aTHX);
785
786	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	}
787	}	1139	}
788	}	1140	}
789		1141
790	struct transfer_args	1142	struct transfer_args
791	{	1143	{
792	struct coro *prev, *next;	1144	struct coro *prev, *next;
793	};	1145	};
794		1146
795	#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)
796		1149
		1150	/** high level stuff ********************************************************/
		1151
797	static void	1152	static int
798	coro_state_destroy (struct coro *coro)	1153	coro_state_destroy (pTHX_ struct coro *coro)
799	{	1154	{
800	if (coro->refcnt--)	1155	if (coro->flags & CF_DESTROYED)
801	return;	1156	return 0;
		1157
		1158	coro->flags |= CF_DESTROYED;
		1159
		1160	if (coro->flags & CF_READY)
		1161	{
		1162	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1163	/* alternative: look through all ready queues and remove the coro */
		1164	LOCK;
		1165	--coro_nready;
		1166	UNLOCK;
		1167	}
		1168	else
		1169	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
802		1170
803	if (coro->mainstack && coro->mainstack != main_mainstack)	1171	if (coro->mainstack && coro->mainstack != main_mainstack)
804	{	1172	{
805	struct coro temp;	1173	struct coro temp;
806	Zero (&temp, 1, struct coro);
807	temp.save = CORO_SAVE_ALL;
808		1174
809	if (coro->flags & CF_RUNNING)	1175	if (coro->flags & CF_RUNNING)
810	croak ("FATAL: tried to destroy currently running coroutine");	1176	croak ("FATAL: tried to destroy currently running coroutine");
811		1177
812	save_perl (&temp);	1178	save_perl (aTHX_ &temp);
813	load_perl (coro);	1179	load_perl (aTHX_ coro);
814		1180
815	coro_destroy_stacks ();	1181	coro_destroy (aTHX_ coro);
816		1182
817	load_perl (&temp); /* this will get rid of defsv etc.. */	1183	load_perl (aTHX_ &temp);
818		1184
819	coro->mainstack = 0;	1185	coro->slot = 0;
820	}	1186	}
821		1187
822	cctx_destroy (coro->cctx);	1188	cctx_destroy (coro->cctx);
823	SvREFCNT_dec (coro->args);	1189	SvREFCNT_dec (coro->args);
824	Safefree (coro);	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
		1195	return 1;
825	}	1196	}
826		1197
827	static int	1198	static int
828	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1199	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
829	{	1200	{
830	struct coro *coro = (struct coro *)mg->mg_ptr;	1201	struct coro *coro = (struct coro *)mg->mg_ptr;
831	mg->mg_ptr = 0;	1202	mg->mg_ptr = 0;
832		1203
		1204	coro->hv = 0;
		1205
		1206	if (--coro->refcnt < 0)
		1207	{
833	coro_state_destroy (coro);	1208	coro_state_destroy (aTHX_ coro);
		1209	Safefree (coro);
		1210	}
834		1211
835	return 0;	1212	return 0;
836	}	1213	}
837		1214
838	static int	1215	static int
…		…
845	return 0;	1222	return 0;
846	}	1223	}
847		1224
848	static MGVTBL coro_state_vtbl = {	1225	static MGVTBL coro_state_vtbl = {
849	0, 0, 0, 0,	1226	0, 0, 0, 0,
850	coro_state_clear,	1227	coro_state_free,
851	0,	1228	0,
852	#ifdef MGf_DUP	1229	#ifdef MGf_DUP
853	coro_state_dup,	1230	coro_state_dup,
854	#else	1231	#else
855	# define MGf_DUP 0	1232	# define MGf_DUP 0
856	#endif	1233	#endif
857	};	1234	};
858		1235
859	static struct coro *
860	SvSTATE (SV *coro)
861	{
862	HV *stash;
863	MAGIC *mg;
864
865	if (SvROK (coro))
866	coro = SvRV (coro);
867
868	stash = SvSTASH (coro);
869	if (stash != coro_stash && stash != coro_state_stash)
870	{
871	/* very slow, but rare, check */
872	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
873	croak ("Coro::State object required");
874	}
875
876	mg = SvMAGIC (coro);
877	assert (mg->mg_type == PERL_MAGIC_ext);
878	return (struct coro *)mg->mg_ptr;
879	}
880
881	static void	1236	static void
882	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)
883	{	1238	{
884	ta->prev = SvSTATE (prev_sv);	1239	ta->prev = SvSTATE (prev_sv);
885	ta->next = SvSTATE (next_sv);	1240	ta->next = SvSTATE (next_sv);
		1241	TRANSFER_CHECK (*ta);
886	}	1242	}
887		1243
888	static void	1244	static void
889	api_transfer (SV *prev_sv, SV *next_sv)	1245	api_transfer (SV *prev_sv, SV *next_sv)
890	{	1246	{
		1247	dTHX;
891	struct transfer_args ta;	1248	struct transfer_args ta;
892		1249
893	prepare_transfer (&ta, prev_sv, next_sv);	1250	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
894	TRANSFER (ta);	1251	TRANSFER (ta);
895	}	1252	}
896		1253
897	static int
898	api_save (SV *coro_sv, int new_save)
899	{
900	struct coro *coro = SvSTATE (coro_sv);
901	int old_save = coro->save;
902
903	if (new_save >= 0)
904	coro->save = new_save;
905
906	return old_save;
907	}
908
909	/** Coro ********************************************************************/	1254	/** Coro ********************************************************************/
910		1255
911	#define PRIO_MAX 3
912	#define PRIO_HIGH 1
913	#define PRIO_NORMAL 0
914	#define PRIO_LOW -1
915	#define PRIO_IDLE -3
916	#define PRIO_MIN -4
917
918	/* for Coro.pm */
919	static SV *coro_current;
920	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
921	static int coro_nready;
922
923	static void	1256	static void
924	coro_enq (SV *coro_sv)	1257	coro_enq (pTHX_ SV *coro_sv)
925	{	1258	{
926	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);
927	coro_nready++;
928	}	1260	}
929		1261
930	static SV *	1262	static SV *
931	coro_deq (int min_prio)	1263	coro_deq (pTHX_ int min_prio)
932	{	1264	{
933	int prio = PRIO_MAX - PRIO_MIN;	1265	int prio = PRIO_MAX - PRIO_MIN;
934		1266
935	min_prio -= PRIO_MIN;	1267	min_prio -= PRIO_MIN;
936	if (min_prio < 0)	1268	if (min_prio < 0)
937	min_prio = 0;	1269	min_prio = 0;
938		1270
939	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1271	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
940	if (AvFILLp (coro_ready [prio]) >= 0)	1272	if (AvFILLp (coro_ready [prio]) >= 0)
941	{
942	coro_nready--;
943	return av_shift (coro_ready [prio]);	1273	return av_shift (coro_ready [prio]);
944	}
945		1274
946	return 0;	1275	return 0;
947	}	1276	}
948		1277
949	static int	1278	static int
950	api_ready (SV *coro_sv)	1279	api_ready (SV *coro_sv)
951	{	1280	{
		1281	dTHX;
952	struct coro *coro;	1282	struct coro *coro;
953		1283
954	if (SvROK (coro_sv))	1284	if (SvROK (coro_sv))
955	coro_sv = SvRV (coro_sv);	1285	coro_sv = SvRV (coro_sv);
956		1286
…		…
960	return 0;	1290	return 0;
961		1291
962	coro->flags |= CF_READY;	1292	coro->flags |= CF_READY;
963		1293
964	LOCK;	1294	LOCK;
965	coro_enq (SvREFCNT_inc (coro_sv));	1295	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1296	++coro_nready;
966	UNLOCK;	1297	UNLOCK;
967		1298
968	return 1;	1299	return 1;
969	}	1300	}
970		1301
971	static int	1302	static int
972	api_is_ready (SV *coro_sv)	1303	api_is_ready (SV *coro_sv)
973	{	1304	{
		1305	dTHX;
974	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1306	return !!(SvSTATE (coro_sv)->flags & CF_READY);
975	}	1307	}
976		1308
977	static void	1309	static void
978	prepare_schedule (struct transfer_args *ta)	1310	prepare_schedule (pTHX_ struct transfer_args *ta)
979	{	1311	{
980	SV *prev, *next;	1312	SV *prev_sv, *next_sv;
981		1313
982	for (;;)	1314	for (;;)
983	{	1315	{
984	LOCK;	1316	LOCK;
985	next = coro_deq (PRIO_MIN);	1317	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1318
		1319	/* nothing to schedule: call the idle handler */
		1320	if (expect_false (!next_sv))
		1321	{
		1322	dSP;
		1323	UNLOCK;
		1324
		1325	ENTER;
		1326	SAVETMPS;
		1327
		1328	PUSHMARK (SP);
		1329	PUTBACK;
		1330	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1331
		1332	FREETMPS;
		1333	LEAVE;
		1334	continue;
		1335	}
		1336
		1337	ta->next = SvSTATE (next_sv);
		1338
		1339	/* cannot transfer to destroyed coros, skip and look for next */
		1340	if (expect_false (ta->next->flags & CF_DESTROYED))
		1341	{
		1342	UNLOCK;
		1343	SvREFCNT_dec (next_sv);
		1344	/* coro_nready is already taken care of by destroy */
		1345	continue;
		1346	}
		1347
		1348	--coro_nready;
986	UNLOCK;	1349	UNLOCK;
987
988	if (next)
989	break;	1350	break;
990
991	{
992	dSP;
993
994	ENTER;
995	SAVETMPS;
996
997	PUSHMARK (SP);
998	PUTBACK;
999	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1000
1001	FREETMPS;
1002	LEAVE;
1003	}	1351	}
1004	}
1005
1006	prev = SvRV (coro_current);
1007	SvRV_set (coro_current, next);
1008		1352
1009	/* free this only after the transfer */	1353	/* free this only after the transfer */
1010	LOCK;	1354	prev_sv = SvRV (coro_current);
1011	free_coro_mortal ();
1012	UNLOCK;
1013	coro_mortal = prev;
1014
1015	assert (!SvROK(prev));//D
1016	assert (!SvROK(next));//D
1017
1018	ta->prev = SvSTATE (prev);	1355	ta->prev = SvSTATE (prev_sv);
1019	ta->next = SvSTATE (next);	1356	TRANSFER_CHECK (*ta);
1020
1021	assert (ta->next->flags & CF_READY);	1357	assert (ta->next->flags & CF_READY);
1022	ta->next->flags &= ~CF_READY;	1358	ta->next->flags &= ~CF_READY;
1023	}	1359	SvRV_set (coro_current, next_sv);
1024		1360
		1361	LOCK;
		1362	free_coro_mortal (aTHX);
		1363	coro_mortal = prev_sv;
		1364	UNLOCK;
		1365	}
		1366
1025	static void	1367	static void
1026	prepare_cede (struct transfer_args *ta)	1368	prepare_cede (pTHX_ struct transfer_args *ta)
1027	{	1369	{
1028	api_ready (coro_current);	1370	api_ready (coro_current);
1029
1030	prepare_schedule (ta);	1371	prepare_schedule (aTHX_ ta);
		1372	}
		1373
		1374	static int
		1375	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1376	{
		1377	if (coro_nready)
		1378	{
		1379	SV *prev = SvRV (coro_current);
		1380	prepare_schedule (aTHX_ ta);
		1381	api_ready (prev);
		1382	return 1;
		1383	}
		1384	else
		1385	return 0;
1031	}	1386	}
1032		1387
1033	static void	1388	static void
1034	api_schedule (void)	1389	api_schedule (void)
1035	{	1390	{
		1391	dTHX;
1036	struct transfer_args ta;	1392	struct transfer_args ta;
1037		1393
1038	prepare_schedule (&ta);	1394	prepare_schedule (aTHX_ &ta);
1039	TRANSFER (ta);	1395	TRANSFER (ta);
1040	}	1396	}
1041		1397
1042	static void	1398	static int
1043	api_cede (void)	1399	api_cede (void)
1044	{	1400	{
		1401	dTHX;
1045	struct transfer_args ta;	1402	struct transfer_args ta;
1046		1403
1047	prepare_cede (&ta);	1404	prepare_cede (aTHX_ &ta);
		1405
		1406	if (expect_true (ta.prev != ta.next))
		1407	{
1048	TRANSFER (ta);	1408	TRANSFER (ta);
		1409	return 1;
		1410	}
		1411	else
		1412	return 0;
1049	}	1413	}
1050		1414
		1415	static int
		1416	api_cede_notself (void)
		1417	{
		1418	dTHX;
		1419	struct transfer_args ta;
		1420
		1421	if (prepare_cede_notself (aTHX_ &ta))
		1422	{
		1423	TRANSFER (ta);
		1424	return 1;
		1425	}
		1426	else
		1427	return 0;
		1428	}
		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
1051	MODULE = Coro::State PACKAGE = Coro::State	1456	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1052		1457
1053	PROTOTYPES: DISABLE	1458	PROTOTYPES: DISABLE
1054		1459
1055	BOOT:	1460	BOOT:
1056	{	1461	{
1057	#ifdef USE_ITHREADS	1462	#ifdef USE_ITHREADS
1058	MUTEX_INIT (&coro_mutex);	1463	MUTEX_INIT (&coro_mutex);
1059	#endif	1464	#endif
1060	BOOT_PAGESIZE;	1465	BOOT_PAGESIZE;
1061		1466
		1467	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1468	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1469
1062	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1470	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1063		1471
		1472	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1473	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1064	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1474	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1065	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1066	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1067	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1068	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1475	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1069		1476
1070	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;
1071		1482
1072	coroapi.ver = CORO_API_VERSION;	1483	coroapi.ver = CORO_API_VERSION;
1073	coroapi.transfer = api_transfer;	1484	coroapi.transfer = api_transfer;
1074		1485
1075	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1486	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1082	struct coro *coro;	1493	struct coro *coro;
1083	HV *hv;	1494	HV *hv;
1084	int i;	1495	int i;
1085		1496
1086	Newz (0, coro, 1, struct coro);	1497	Newz (0, coro, 1, struct coro);
1087	coro->args = newAV ();	1498	coro->args = newAV ();
1088	coro->save = CORO_SAVE_ALL;
1089	coro->flags = CF_NEW;	1499	coro->flags = CF_NEW;
1090		1500
		1501	if (coro_first) coro_first->prev = coro;
		1502	coro->next = coro_first;
		1503	coro_first = coro;
		1504
1091	hv = newHV ();	1505	coro->hv = hv = newHV ();
1092	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;
1093	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1507	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1094		1508
		1509	av_extend (coro->args, items - 1);
1095	for (i = 1; i < items; i++)	1510	for (i = 1; i < items; i++)
1096	av_push (coro->args, newSVsv (ST (i)));	1511	av_push (coro->args, newSVsv (ST (i)));
1097	}	1512	}
1098	OUTPUT:	1513	OUTPUT:
1099	RETVAL	1514	RETVAL
1100		1515
1101	int	1516	# these not obviously related functions are all rolled into the same xs
1102	save (SV *coro, int new_save = -1)	1517	# function to increase chances that they all will call transfer with the same
1103	CODE:	1518	# stack offset
1104	RETVAL = api_save (coro, new_save);
1105	OUTPUT:
1106	RETVAL
1107
1108	void	1519	void
1109	_set_stacklevel (...)	1520	_set_stacklevel (...)
1110	ALIAS:	1521	ALIAS:
1111	Coro::State::transfer = 1	1522	Coro::State::transfer = 1
1112	Coro::schedule = 2	1523	Coro::schedule = 2
1113	Coro::cede = 3	1524	Coro::cede = 3
		1525	Coro::cede_notself = 4
1114	CODE:	1526	CODE:
1115	{	1527	{
1116	struct transfer_args ta;	1528	struct transfer_args ta;
1117		1529
1118	switch (ix)	1530	switch (ix)
…		…
1124		1536
1125	case 1:	1537	case 1:
1126	if (items != 2)	1538	if (items != 2)
1127	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);
1128		1540
1129	prepare_transfer (&ta, ST (0), ST (1));	1541	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1130	break;	1542	break;
1131		1543
1132	case 2:	1544	case 2:
1133	prepare_schedule (&ta);	1545	prepare_schedule (aTHX_ &ta);
1134	break;	1546	break;
1135		1547
1136	case 3:	1548	case 3:
1137	prepare_cede (&ta);	1549	prepare_cede (aTHX_ &ta);
		1550	break;
		1551
		1552	case 4:
		1553	if (!prepare_cede_notself (aTHX_ &ta))
		1554	XSRETURN_EMPTY;
		1555
1138	break;	1556	break;
1139	}	1557	}
1140		1558
		1559	BARRIER;
1141	TRANSFER (ta);	1560	TRANSFER (ta);
1142	}
1143		1561
1144	void	1562	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1145	_clone_state_from (SV *dst, SV *src)	1563	XSRETURN_YES;
		1564	}
		1565
		1566	bool
		1567	_destroy (SV *coro_sv)
1146	CODE:	1568	CODE:
1147	{	1569	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1148	struct coro *coro_src = SvSTATE (src);	1570	OUTPUT:
1149		1571	RETVAL
1150	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1151
1152	++coro_src->refcnt;
1153	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1154	}
1155		1572
1156	void	1573	void
1157	_exit (code)	1574	_exit (code)
1158	int code	1575	int code
1159	PROTOTYPE: $	1576	PROTOTYPE: $
1160	CODE:	1577	CODE:
1161	_exit (code);	1578	_exit (code);
1162		1579
1163	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
1164	cctx_count ()	1590	cctx_count ()
1165	CODE:	1591	CODE:
1166	RETVAL = cctx_count;	1592	RETVAL = cctx_count;
1167	OUTPUT:	1593	OUTPUT:
1168	RETVAL	1594	RETVAL
…		…
1172	CODE:	1598	CODE:
1173	RETVAL = cctx_idle;	1599	RETVAL = cctx_idle;
1174	OUTPUT:	1600	OUTPUT:
1175	RETVAL	1601	RETVAL
1176		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
1177	MODULE = Coro::State PACKAGE = Coro	1702	MODULE = Coro::State PACKAGE = Coro
1178		1703
1179	BOOT:	1704	BOOT:
1180	{	1705	{
1181	int i;	1706	int i;
1182		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
1183	coro_stash = gv_stashpv ("Coro", TRUE);	1718	coro_stash = gv_stashpv ("Coro", TRUE);
1184		1719
1185	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1720	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1186	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1721	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1187	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1722	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1188	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1723	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1189	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1724	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1190	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1725	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1191		1726
1192	coro_current = get_sv ("Coro::current", FALSE);
1193	SvREADONLY_on (coro_current);
1194
1195	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1727	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1196	coro_ready[i] = newAV ();	1728	coro_ready[i] = newAV ();
1197		1729
1198	{	1730	{
1199	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 */
1200		1733
1201	coroapi.schedule = api_schedule;	1734	coroapi.schedule = api_schedule;
1202	coroapi.save = api_save;
1203	coroapi.cede = api_cede;	1735	coroapi.cede = api_cede;
		1736	coroapi.cede_notself = api_cede_notself;
1204	coroapi.ready = api_ready;	1737	coroapi.ready = api_ready;
1205	coroapi.is_ready = api_is_ready;	1738	coroapi.is_ready = api_is_ready;
1206	coroapi.nready = &coro_nready;	1739	coroapi.nready = &coro_nready;
1207	coroapi.current = coro_current;	1740	coroapi.current = coro_current;
1208		1741
1209	GCoroAPI = &coroapi;	1742	GCoroAPI = &coroapi;
1210	sv_setiv (sv, (IV)&coroapi);	1743	sv_setiv (sv, (IV)&coroapi);
1211	SvREADONLY_on (sv);	1744	SvREADONLY_on (sv);
1212	}	1745	}
…		…
1247	CODE:	1780	CODE:
1248	RETVAL = boolSV (api_ready (self));	1781	RETVAL = boolSV (api_ready (self));
1249	OUTPUT:	1782	OUTPUT:
1250	RETVAL	1783	RETVAL
1251		1784
1252	SV *
1253	is_ready (SV *self)
1254	PROTOTYPE: $
1255	CODE:
1256	RETVAL = boolSV (api_is_ready (self));
1257	OUTPUT:
1258	RETVAL
1259
1260	int	1785	int
1261	nready (...)	1786	nready (...)
1262	PROTOTYPE:	1787	PROTOTYPE:
1263	CODE:	1788	CODE:
1264	RETVAL = coro_nready;	1789	RETVAL = coro_nready;
1265	OUTPUT:	1790	OUTPUT:
1266	RETVAL	1791	RETVAL
1267		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
1268	MODULE = Coro::State PACKAGE = Coro::AIO	1864	MODULE = Coro::State PACKAGE = Coro::AIO
1269		1865
1270	SV *	1866	SV *
1271	_get_state ()	1867	_get_state ()
1272	CODE:	1868	CODE:

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