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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.146 by root, Sat Mar 17 19:51:57 2007 UTC vs.
Revision 1.247 by root, Wed Sep 24 21:31:29 2008 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
2		2
3	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
		9	#include "perliol.h"
8		10
9	#include "patchlevel.h"	11	#include "patchlevel.h"
10		12
11	#include <stdio.h>	13	#include <stdio.h>
12	#include <errno.h>	14	#include <errno.h>
13	#include <assert.h>	15	#include <assert.h>
		16
		17	#ifdef WIN32
		18	# undef setjmp
		19	# undef longjmp
		20	# undef _exit
		21	# define setjmp _setjmp // deep magic, don't ask
		22	#else
		23	# include <inttypes.h> /* most portable stdint.h */
		24	#endif
14		25
15	#ifdef HAVE_MMAP	26	#ifdef HAVE_MMAP
16	# include <unistd.h>	27	# include <unistd.h>
17	# include <sys/mman.h>	28	# include <sys/mman.h>
18	# ifndef MAP_ANONYMOUS	29	# ifndef MAP_ANONYMOUS
…		…
70	# ifndef IS_PADCONST	81	# ifndef IS_PADCONST
71	# define IS_PADCONST(v) 0	82	# define IS_PADCONST(v) 0
72	# endif	83	# endif
73	#endif	84	#endif
74		85
		86	/* 5.8.8 */
		87	#ifndef GV_NOTQUAL
		88	# define GV_NOTQUAL 0
		89	#endif
		90	#ifndef newSV
		91	# define newSV(l) NEWSV(0,l)
		92	#endif
		93
		94	/* 5.11 */
		95	#ifndef CxHASARGS
		96	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		97	#endif
		98
75	/* 5.8.7 */	99	/* 5.8.7 */
76	#ifndef SvRV_set	100	#ifndef SvRV_set
77	# define SvRV_set(s,v) SvRV(s) = (v)	101	# define SvRV_set(s,v) SvRV(s) = (v)
78	#endif	102	#endif
79		103
…		…
88	/* prefer perl internal functions over our own? */	112	/* prefer perl internal functions over our own? */
89	#ifndef CORO_PREFER_PERL_FUNCTIONS	113	#ifndef CORO_PREFER_PERL_FUNCTIONS
90	# define CORO_PREFER_PERL_FUNCTIONS 0	114	# define CORO_PREFER_PERL_FUNCTIONS 0
91	#endif	115	#endif
92		116
93	/* The next macro should declare a variable stacklevel that contains and approximation	117	/* The next macros try to return the current stack pointer, in an as
94	* to the current C stack pointer. Its property is that it changes with each call	118	* portable way as possible. */
95	* and should be unique. */
96	#define dSTACKLEVEL int stacklevel	119	#define dSTACKLEVEL volatile char stacklevel
97	#define STACKLEVEL ((void *)&stacklevel)	120	#define STACKLEVEL ((void *)&stacklevel)
98		121
99	#define IN_DESTRUCT (PL_main_cv == Nullcv)	122	#define IN_DESTRUCT (PL_main_cv == Nullcv)
100		123
101	#if __GNUC__ >= 3	124	#if __GNUC__ >= 3
102	# define attribute(x) __attribute__(x)	125	# define attribute(x) __attribute__(x)
103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	126	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		127	# define expect(expr,value) __builtin_expect ((expr),(value))
104	#else	128	#else
105	# define attribute(x)	129	# define attribute(x)
106	# define BARRIER	130	# define BARRIER
		131	# define expect(expr,value) (expr)
107	#endif	132	#endif
		133
		134	#define expect_false(expr) expect ((expr) != 0, 0)
		135	#define expect_true(expr) expect ((expr) != 0, 1)
108		136
109	#define NOINLINE attribute ((noinline))	137	#define NOINLINE attribute ((noinline))
110		138
111	#include "CoroAPI.h"	139	#include "CoroAPI.h"
112		140
…		…
126	I32 laststype;	154	I32 laststype;
127	int laststatval;	155	int laststatval;
128	Stat_t statcache;	156	Stat_t statcache;
129	};	157	};
130		158
		159	static double (*nvtime)(); /* so why doesn't it take void? */
		160
131	static size_t coro_stacksize = CORO_STACKSIZE;	161	static size_t coro_stacksize = CORO_STACKSIZE;
132	static struct CoroAPI coroapi;	162	static struct CoroAPI coroapi;
133	static AV *main_mainstack; /* used to differentiate between $main and others */	163	static AV *main_mainstack; /* used to differentiate between $main and others */
		164	static JMPENV *main_top_env;
134	static HV *coro_state_stash, *coro_stash;	165	static HV *coro_state_stash, *coro_stash;
135	static SV *coro_mortal; /* will be freed after next transfer */	166	static volatile SV *coro_mortal; /* will be freed after next transfer */
		167
		168	static GV *irsgv; /* $/ */
		169	static GV *stdoutgv; /* *STDOUT */
		170	static SV *rv_diehook;
		171	static SV *rv_warnhook;
		172	static HV *hv_sig; /* %SIG */
		173
		174	/* async_pool helper stuff */
		175	static SV *sv_pool_rss;
		176	static SV *sv_pool_size;
		177	static AV *av_async_pool;
		178
		179	/* Coro::AnyEvent */
		180	static SV *sv_activity;
136		181
137	static struct coro_cctx *cctx_first;	182	static struct coro_cctx *cctx_first;
138	static int cctx_count, cctx_idle;	183	static int cctx_count, cctx_idle;
		184
		185	enum {
		186	CC_MAPPED = 0x01,
		187	CC_NOREUSE = 0x02, /* throw this away after tracing */
		188	CC_TRACE = 0x04,
		189	CC_TRACE_SUB = 0x08, /* trace sub calls */
		190	CC_TRACE_LINE = 0x10, /* trace each statement */
		191	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		192	};
139		193
140	/* this is a structure representing a c-level coroutine */	194	/* this is a structure representing a c-level coroutine */
141	typedef struct coro_cctx {	195	typedef struct coro_cctx {
142	struct coro_cctx *next;	196	struct coro_cctx *next;
143		197
…		…
152	coro_context cctx;	206	coro_context cctx;
153		207
154	#if CORO_USE_VALGRIND	208	#if CORO_USE_VALGRIND
155	int valgrind_id;	209	int valgrind_id;
156	#endif	210	#endif
157	char inuse, mapped;	211	unsigned char flags;
158	} coro_cctx;	212	} coro_cctx;
159		213
160	enum {	214	enum {
161	CF_RUNNING = 0x0001, /* coroutine is running */	215	CF_RUNNING = 0x0001, /* coroutine is running */
162	CF_READY = 0x0002, /* coroutine is ready */	216	CF_READY = 0x0002, /* coroutine is ready */
163	CF_NEW = 0x0004, /* has never been switched to */	217	CF_NEW = 0x0004, /* has never been switched to */
164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	218	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
165	};	219	};
166		220
		221	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		222	typedef struct {
		223	SV *defsv;
		224	AV *defav;
		225	SV *errsv;
		226	SV *irsgv;
		227	#define VAR(name,type) type name;
		228	# include "state.h"
		229	#undef VAR
		230	} perl_slots;
		231
		232	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		233
167	/* this is a structure representing a perl-level coroutine */	234	/* this is a structure representing a perl-level coroutine */
168	struct coro {	235	struct coro {
169	/* the c coroutine allocated to this perl coroutine, if any */	236	/* the c coroutine allocated to this perl coroutine, if any */
170	coro_cctx *cctx;	237	coro_cctx *cctx;
171		238
		239	/* process data */
		240	AV *mainstack;
		241	perl_slots *slot; /* basically the saved sp */
		242
172	/* data associated with this coroutine (initial args) */	243	AV *args; /* data associated with this coroutine (initial args) */
173	AV *args;	244	int refcnt; /* coroutines are refcounted, yes */
174	int refcnt;
175	int save; /* CORO_SAVE flags */
176	int flags; /* CF_ flags */	245	int flags; /* CF_ flags */
		246	HV *hv; /* the perl hash associated with this coro, if any */
177		247
178	/* optionally saved, might be zero */	248	/* statistics */
179	AV *defav; /* @_ */	249	int usecount; /* number of transfers to this coro */
180	SV *defsv; /* $_ */
181	SV *errsv; /* $@ */
182	SV *irssv; /* $/ */
183	SV *irssv_sv; /* real $/ cache */
184
185	#define VAR(name,type) type name;
186	# include "state.h"
187	#undef VAR
188		250
189	/* coro process data */	251	/* coro process data */
190	int prio;	252	int prio;
		253	SV *throw; /* exception to be thrown */
		254
		255	/* async_pool */
		256	SV *saved_deffh;
		257
		258	/* linked list */
		259	struct coro *next, *prev;
191	};	260	};
192		261
193	typedef struct coro *Coro__State;	262	typedef struct coro *Coro__State;
194	typedef struct coro *Coro__State_or_hashref;	263	typedef struct coro *Coro__State_or_hashref;
195		264
…		…
202	#define PRIO_IDLE -3	271	#define PRIO_IDLE -3
203	#define PRIO_MIN -4	272	#define PRIO_MIN -4
204		273
205	/* for Coro.pm */	274	/* for Coro.pm */
206	static SV *coro_current;	275	static SV *coro_current;
		276	static SV *coro_readyhook;
207	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	277	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
208	static int coro_nready;	278	static int coro_nready;
		279	static struct coro *coro_first;
209		280
210	/** lowlevel stuff **********************************************************/	281	/** lowlevel stuff **********************************************************/
		282
		283	static SV *
		284	coro_get_sv (pTHX_ const char *name, int create)
		285	{
		286	#if PERL_VERSION_ATLEAST (5,10,0)
		287	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		288	get_sv (name, create);
		289	#endif
		290	return get_sv (name, create);
		291	}
		292
		293	static AV *
		294	coro_get_av (pTHX_ const char *name, int create)
		295	{
		296	#if PERL_VERSION_ATLEAST (5,10,0)
		297	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		298	get_av (name, create);
		299	#endif
		300	return get_av (name, create);
		301	}
		302
		303	static HV *
		304	coro_get_hv (pTHX_ const char *name, int create)
		305	{
		306	#if PERL_VERSION_ATLEAST (5,10,0)
		307	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		308	get_hv (name, create);
		309	#endif
		310	return get_hv (name, create);
		311	}
211		312
212	static AV *	313	static AV *
213	coro_clone_padlist (pTHX_ CV *cv)	314	coro_clone_padlist (pTHX_ CV *cv)
214	{	315	{
215	AV *padlist = CvPADLIST (cv);	316	AV *padlist = CvPADLIST (cv);
216	AV *newpadlist, *newpad;	317	AV *newpadlist, *newpad;
217		318
218	newpadlist = newAV ();	319	newpadlist = newAV ();
219	AvREAL_off (newpadlist);	320	AvREAL_off (newpadlist);
220	#if PERL_VERSION_ATLEAST (5,9,0)	321	#if PERL_VERSION_ATLEAST (5,10,0)
221	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	322	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
222	#else	323	#else
223	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	324	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
224	#endif	325	#endif
225	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	326	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
263		364
264	/* casting is fun. */	365	/* casting is fun. */
265	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	366	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266	free_padlist (aTHX_ padlist);	367	free_padlist (aTHX_ padlist);
267		368
268	SvREFCNT_dec (av);	369	SvREFCNT_dec (av); /* sv_magicext increased the refcount */
269		370
270	return 0;	371	return 0;
271	}	372	}
272		373
273	#define PERL_MAGIC_coro PERL_MAGIC_ext	374	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		375	#define CORO_MAGIC_type_state PERL_MAGIC_ext
274		376
275	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	377	static MGVTBL coro_cv_vtbl = {
		378	0, 0, 0, 0,
		379	coro_cv_free
		380	};
276		381
277	#define CORO_MAGIC(cv) \	382	#define CORO_MAGIC(sv,type) \
278	SvMAGIC (cv) \	383	SvMAGIC (sv) \
279	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	384	? SvMAGIC (sv)->mg_type == type \
280	? SvMAGIC (cv) \	385	? SvMAGIC (sv) \
281	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	386	: mg_find (sv, type) \
282	: 0	387	: 0
		388
		389	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		390	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		391
		392	static struct coro *
		393	SvSTATE_ (pTHX_ SV *coro)
		394	{
		395	HV *stash;
		396	MAGIC *mg;
		397
		398	if (SvROK (coro))
		399	coro = SvRV (coro);
		400
		401	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		402	croak ("Coro::State object required");
		403
		404	stash = SvSTASH (coro);
		405	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		406	{
		407	/* very slow, but rare, check */
		408	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		409	croak ("Coro::State object required");
		410	}
		411
		412	mg = CORO_MAGIC_state (coro);
		413	return (struct coro *)mg->mg_ptr;
		414	}
		415
		416	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
283		417
284	/* the next two functions merely cache the padlists */	418	/* the next two functions merely cache the padlists */
285	static void	419	static void
286	get_padlist (pTHX_ CV *cv)	420	get_padlist (pTHX_ CV *cv)
287	{	421	{
288	MAGIC *mg = CORO_MAGIC (cv);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
289	AV *av;	423	AV *av;
290		424
291	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	425	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
292	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	426	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
293	else	427	else
294	{	428	{
295	#if CORO_PREFER_PERL_FUNCTIONS	429	#if CORO_PREFER_PERL_FUNCTIONS
296	/* this is probably cleaner, but also slower? */	430	/* this is probably cleaner? but also slower! */
		431	/* in practise, it seems to be less stable */
297	CV *cp = Perl_cv_clone (cv);	432	CV *cp = Perl_cv_clone (cv);
298	CvPADLIST (cv) = CvPADLIST (cp);	433	CvPADLIST (cv) = CvPADLIST (cp);
299	CvPADLIST (cp) = 0;	434	CvPADLIST (cp) = 0;
300	SvREFCNT_dec (cp);	435	SvREFCNT_dec (cp);
301	#else	436	#else
…		…
305	}	440	}
306		441
307	static void	442	static void
308	put_padlist (pTHX_ CV *cv)	443	put_padlist (pTHX_ CV *cv)
309	{	444	{
310	MAGIC *mg = CORO_MAGIC (cv);	445	MAGIC *mg = CORO_MAGIC_cv (cv);
311	AV *av;	446	AV *av;
312		447
313	if (!mg)	448	if (expect_false (!mg))
314	{	449	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
315	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
316	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
317	mg->mg_virtual = &vtbl_coro;
318	mg->mg_obj = (SV *)newAV ();
319	}
320		450
321	av = (AV *)mg->mg_obj;	451	av = (AV *)mg->mg_obj;
322		452
323	if (AvFILLp (av) >= AvMAX (av))	453	if (expect_false (AvFILLp (av) >= AvMAX (av)))
324	av_extend (av, AvMAX (av) + 1);	454	av_extend (av, AvMAX (av) + 1);
325		455
326	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	456	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
327	}	457	}
328		458
329	/** load & save, init *******************************************************/	459	/** load & save, init *******************************************************/
330
331	#define SB do {
332	#define SE } while (0)
333
334	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
335		460
336	static void	461	static void
337	load_perl (pTHX_ Coro__State c)	462	load_perl (pTHX_ Coro__State c)
338	{	463	{
		464	perl_slots *slot = c->slot;
		465	c->slot = 0;
		466
		467	PL_mainstack = c->mainstack;
		468
		469	GvSV (PL_defgv) = slot->defsv;
		470	GvAV (PL_defgv) = slot->defav;
		471	GvSV (PL_errgv) = slot->errsv;
		472	GvSV (irsgv) = slot->irsgv;
		473
339	#define VAR(name,type) PL_ ## name = c->name;	474	#define VAR(name,type) PL_ ## name = slot->name;
340	# include "state.h"	475	# include "state.h"
341	#undef VAR	476	#undef VAR
342
343	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
344	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
345	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
346	if (c->irssv)
347	{
348	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
349	SvREFCNT_dec (c->irssv);
350	else
351	{
352	REPLACE_SV (PL_rs, c->irssv);
353	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
354	sv_setsv (c->irssv_sv, PL_rs);
355	}
356	}
357		477
358	{	478	{
359	dSP;	479	dSP;
		480
360	CV *cv;	481	CV *cv;
361		482
362	/* now do the ugly restore mess */	483	/* now do the ugly restore mess */
363	while ((cv = (CV *)POPs))	484	while (expect_true (cv = (CV *)POPs))
364	{	485	{
365	put_padlist (aTHX_ cv); /* mark this padlist as available */	486	put_padlist (aTHX_ cv); /* mark this padlist as available */
366	CvDEPTH (cv) = PTR2IV (POPs);	487	CvDEPTH (cv) = PTR2IV (POPs);
367	CvPADLIST (cv) = (AV *)POPs;	488	CvPADLIST (cv) = (AV *)POPs;
368	}	489	}
369		490
370	PUTBACK;	491	PUTBACK;
371	}	492	}
372	assert (!PL_comppad || AvARRAY (PL_comppad));//D
373	}	493	}
374		494
375	static void	495	static void
376	save_perl (pTHX_ Coro__State c)	496	save_perl (pTHX_ Coro__State c)
377	{	497	{
378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
379	{	498	{
380	dSP;	499	dSP;
381	I32 cxix = cxstack_ix;	500	I32 cxix = cxstack_ix;
382	PERL_CONTEXT *ccstk = cxstack;	501	PERL_CONTEXT *ccstk = cxstack;
383	PERL_SI *top_si = PL_curstackinfo;	502	PERL_SI *top_si = PL_curstackinfo;
…		…
385	/*	504	/*
386	* the worst thing you can imagine happens first - we have to save	505	* the worst thing you can imagine happens first - we have to save
387	* (and reinitialize) all cv's in the whole callchain :(	506	* (and reinitialize) all cv's in the whole callchain :(
388	*/	507	*/
389		508
390	EXTEND (SP, 3 + 1);
391	PUSHs (Nullsv);	509	XPUSHs (Nullsv);
392	/* this loop was inspired by pp_caller */	510	/* this loop was inspired by pp_caller */
393	for (;;)	511	for (;;)
394	{	512	{
395	while (cxix >= 0)	513	while (expect_true (cxix >= 0))
396	{	514	{
397	PERL_CONTEXT *cx = &ccstk[cxix--];	515	PERL_CONTEXT *cx = &ccstk[cxix--];
398		516
399	if (CxTYPE (cx) == CXt_SUB)	517	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
400	{	518	{
401	CV *cv = cx->blk_sub.cv;	519	CV *cv = cx->blk_sub.cv;
402		520
403	if (CvDEPTH (cv))	521	if (expect_true (CvDEPTH (cv)))
404	{	522	{
405	EXTEND (SP, 3);	523	EXTEND (SP, 3);
406	PUSHs ((SV *)CvPADLIST (cv));	524	PUSHs ((SV *)CvPADLIST (cv));
407	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	525	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
408	PUSHs ((SV *)cv);	526	PUSHs ((SV *)cv);
409		527
410	CvDEPTH (cv) = 0;	528	CvDEPTH (cv) = 0;
411	get_padlist (aTHX_ cv);	529	get_padlist (aTHX_ cv);
412	}	530	}
413	}	531	}
414	}	532	}
415		533
416	if (top_si->si_type == PERLSI_MAIN)	534	if (expect_true (top_si->si_type == PERLSI_MAIN))
417	break;	535	break;
418		536
419	top_si = top_si->si_prev;	537	top_si = top_si->si_prev;
420	ccstk = top_si->si_cxstack;	538	ccstk = top_si->si_cxstack;
421	cxix = top_si->si_cxix;	539	cxix = top_si->si_cxix;
422	}	540	}
423		541
424	PUTBACK;	542	PUTBACK;
425	}	543	}
426		544
427	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	545	/* allocate some space on the context stack for our purposes */
428	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	546	/* we manually unroll here, as usually 2 slots is enough */
429	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	547	if (SLOT_COUNT >= 1) CXINC;
430	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	548	if (SLOT_COUNT >= 2) CXINC;
		549	if (SLOT_COUNT >= 3) CXINC;
		550	{
		551	int i;
		552	for (i = 3; i < SLOT_COUNT; ++i)
		553	CXINC;
		554	}
		555	cxstack_ix -= SLOT_COUNT; /* undo allocation */
431		556
		557	c->mainstack = PL_mainstack;
		558
		559	{
		560	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		561
		562	slot->defav = GvAV (PL_defgv);
		563	slot->defsv = DEFSV;
		564	slot->errsv = ERRSV;
		565	slot->irsgv = GvSV (irsgv);
		566
432	#define VAR(name,type)c->name = PL_ ## name;	567	#define VAR(name,type) slot->name = PL_ ## name;
433	# include "state.h"	568	# include "state.h"
434	#undef VAR	569	#undef VAR
		570	}
435	}	571	}
436		572
437	/*	573	/*
438	* allocate various perl stacks. This is an exact copy	574	* allocate various perl stacks. This is an exact copy
439	* of perl.c:init_stacks, except that it uses less memory	575	* of perl.c:init_stacks, except that it uses less memory
…		…
444	# define coro_init_stacks init_stacks	580	# define coro_init_stacks init_stacks
445	#else	581	#else
446	static void	582	static void
447	coro_init_stacks (pTHX)	583	coro_init_stacks (pTHX)
448	{	584	{
449	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	585	PL_curstackinfo = new_stackinfo(32, 8);
450	PL_curstackinfo->si_type = PERLSI_MAIN;	586	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	587	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	588	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		589
454	PL_stack_base = AvARRAY(PL_curstack);	590	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	591	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	592	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		593
458	New(50,PL_tmps_stack,128,SV*);	594	New(50,PL_tmps_stack,32,SV*);
459	PL_tmps_floor = -1;	595	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	596	PL_tmps_ix = -1;
461	PL_tmps_max = 128;	597	PL_tmps_max = 32;
462		598
463	New(54,PL_markstack,32,I32);	599	New(54,PL_markstack,16,I32);
464	PL_markstack_ptr = PL_markstack;	600	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 32;	601	PL_markstack_max = PL_markstack + 16;
466		602
467	#ifdef SET_MARK_OFFSET	603	#ifdef SET_MARK_OFFSET
468	SET_MARK_OFFSET;	604	SET_MARK_OFFSET;
469	#endif	605	#endif
470		606
471	New(54,PL_scopestack,32,I32);	607	New(54,PL_scopestack,8,I32);
472	PL_scopestack_ix = 0;	608	PL_scopestack_ix = 0;
473	PL_scopestack_max = 32;	609	PL_scopestack_max = 8;
474		610
475	New(54,PL_savestack,64,ANY);	611	New(54,PL_savestack,24,ANY);
476	PL_savestack_ix = 0;	612	PL_savestack_ix = 0;
477	PL_savestack_max = 64;	613	PL_savestack_max = 24;
478		614
479	#if !PERL_VERSION_ATLEAST (5,9,0)	615	#if !PERL_VERSION_ATLEAST (5,10,0)
480	New(54,PL_retstack,16,OP*);	616	New(54,PL_retstack,4,OP*);
481	PL_retstack_ix = 0;	617	PL_retstack_ix = 0;
482	PL_retstack_max = 16;	618	PL_retstack_max = 4;
483	#endif	619	#endif
484	}	620	}
485	#endif	621	#endif
486		622
487	/*	623	/*
488	* destroy the stacks, the callchain etc...	624	* destroy the stacks, the callchain etc...
489	*/	625	*/
490	static void	626	static void
491	coro_destroy_stacks (pTHX)	627	coro_destroy_stacks (pTHX)
492	{	628	{
493	if (!IN_DESTRUCT)
494	{
495	/* restore all saved variables and stuff */
496	LEAVE_SCOPE (0);
497	assert (PL_tmps_floor == -1);
498
499	/* free all temporaries */
500	FREETMPS;
501	assert (PL_tmps_ix == -1);
502
503	/* unwind all extra stacks */
504	POPSTACK_TO (PL_mainstack);
505
506	/* unwind main stack */
507	dounwind (-1);
508	}
509
510	while (PL_curstackinfo->si_next)	629	while (PL_curstackinfo->si_next)
511	PL_curstackinfo = PL_curstackinfo->si_next;	630	PL_curstackinfo = PL_curstackinfo->si_next;
512		631
513	while (PL_curstackinfo)	632	while (PL_curstackinfo)
514	{	633	{
…		…
524		643
525	Safefree (PL_tmps_stack);	644	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	645	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	646	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	647	Safefree (PL_savestack);
529	#if !PERL_VERSION_ATLEAST (5,9,0)	648	#if !PERL_VERSION_ATLEAST (5,10,0)
530	Safefree (PL_retstack);	649	Safefree (PL_retstack);
531	#endif	650	#endif
532	}	651	}
533		652
		653	static size_t
		654	coro_rss (pTHX_ struct coro *coro)
		655	{
		656	size_t rss = sizeof (*coro);
		657
		658	if (coro->mainstack)
		659	{
		660	perl_slots tmp_slot;
		661	perl_slots *slot;
		662
		663	if (coro->flags & CF_RUNNING)
		664	{
		665	slot = &tmp_slot;
		666
		667	#define VAR(name,type) slot->name = PL_ ## name;
		668	# include "state.h"
		669	#undef VAR
		670	}
		671	else
		672	slot = coro->slot;
		673
		674	if (slot)
		675	{
		676	rss += sizeof (slot->curstackinfo);
		677	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		678	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		679	rss += slot->tmps_max * sizeof (SV *);
		680	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		681	rss += slot->scopestack_max * sizeof (I32);
		682	rss += slot->savestack_max * sizeof (ANY);
		683
		684	#if !PERL_VERSION_ATLEAST (5,10,0)
		685	rss += slot->retstack_max * sizeof (OP *);
		686	#endif
		687	}
		688	}
		689
		690	return rss;
		691	}
		692
534	/** coroutine stack handling ************************************************/	693	/** coroutine stack handling ************************************************/
535		694
		695	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		696	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		697	static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
		698
		699	/* apparently < 5.8.8 */
		700	#ifndef MgPV_nolen_const
		701	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		702	SvPV_nolen((SV*)((mg)->mg_ptr)) : \
		703	(const char*)(mg)->mg_ptr)
		704	#endif
		705
		706	/*
		707	* This overrides the default magic get method of %SIG elements.
		708	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		709	* and instead of tryign to save and restore the hash elements, we just provide
		710	* readback here.
		711	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		712	* not expecting this to actually change the hook. This is a potential problem
		713	* when a schedule happens then, but we ignore this.
		714	*/
		715	static int
		716	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		717	{
		718	const char *s = MgPV_nolen_const (mg);
		719
		720	if (*s == '_')
		721	{
		722	SV **svp = 0;
		723
		724	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		725	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		726
		727	if (svp)
		728	{
		729	sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
		730	return 0;
		731	}
		732	}
		733
		734	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		735	}
		736
		737	static int
		738	coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
		739	{
		740	const char *s = MgPV_nolen_const (mg);
		741
		742	if (*s == '_')
		743	{
		744	SV **svp = 0;
		745
		746	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		747	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		748
		749	if (svp)
		750	{
		751	SV *old = *svp;
		752	*svp = 0;
		753	SvREFCNT_dec (old);
		754	return 0;
		755	}
		756	}
		757
		758	return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
		759	}
		760
		761	static int
		762	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		763	{
		764	const char *s = MgPV_nolen_const (mg);
		765
		766	if (*s == '_')
		767	{
		768	SV **svp = 0;
		769
		770	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		771	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		772
		773	if (svp)
		774	{
		775	SV *old = *svp;
		776	*svp = newSVsv (sv);
		777	SvREFCNT_dec (old);
		778	return 0;
		779	}
		780	}
		781
		782	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		783	}
		784
536	static void	785	static void
537	setup_coro (pTHX_ struct coro *coro)	786	coro_setup (pTHX_ struct coro *coro)
538	{	787	{
539	/*	788	/*
540	* emulate part of the perl startup here.	789	* emulate part of the perl startup here.
541	*/	790	*/
542	coro_init_stacks (aTHX);	791	coro_init_stacks (aTHX);
543		792
		793	PL_runops = RUNOPS_DEFAULT;
544	PL_curcop = &PL_compiling;	794	PL_curcop = &PL_compiling;
545	PL_in_eval = EVAL_NULL;	795	PL_in_eval = EVAL_NULL;
546	PL_comppad = 0;	796	PL_comppad = 0;
547	PL_curpm = 0;	797	PL_curpm = 0;
		798	PL_curpad = 0;
548	PL_localizing = 0;	799	PL_localizing = 0;
549	PL_dirty = 0;	800	PL_dirty = 0;
550	PL_restartop = 0;	801	PL_restartop = 0;
		802	#if PERL_VERSION_ATLEAST (5,10,0)
		803	PL_parser = 0;
		804	#endif
		805
		806	/* recreate the die/warn hooks */
		807	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		808	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		809
		810	GvSV (PL_defgv) = newSV (0);
		811	GvAV (PL_defgv) = coro->args; coro->args = 0;
		812	GvSV (PL_errgv) = newSV (0);
		813	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		814	PL_rs = newSVsv (GvSV (irsgv));
		815	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
551		816
552	{	817	{
553	dSP;	818	dSP;
554	LOGOP myop;	819	LOGOP myop;
555		820
556	SvREFCNT_dec (GvAV (PL_defgv));
557	GvAV (PL_defgv) = coro->args; coro->args = 0;
558
559	Zero (&myop, 1, LOGOP);	821	Zero (&myop, 1, LOGOP);
560	myop.op_next = Nullop;	822	myop.op_next = Nullop;
561	myop.op_flags = OPf_WANT_VOID;	823	myop.op_flags = OPf_WANT_VOID;
562		824
563	PUSHMARK (SP);	825	PUSHMARK (SP);
564	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	826	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
565	PUTBACK;	827	PUTBACK;
566	PL_op = (OP *)&myop;	828	PL_op = (OP *)&myop;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	829	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	830	SPAGAIN;
569	}	831	}
570		832
571	ENTER; /* necessary e.g. for dounwind */	833	/* this newly created coroutine might be run on an existing cctx which most
		834	* likely was suspended in set_stacklevel, called from entersub.
		835	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		836	* so we ENTER here for symmetry
		837	*/
		838	ENTER;
		839	}
		840
		841	static void
		842	coro_destroy (pTHX_ struct coro *coro)
		843	{
		844	if (!IN_DESTRUCT)
		845	{
		846	/* restore all saved variables and stuff */
		847	LEAVE_SCOPE (0);
		848	assert (PL_tmps_floor == -1);
		849
		850	/* free all temporaries */
		851	FREETMPS;
		852	assert (PL_tmps_ix == -1);
		853
		854	/* unwind all extra stacks */
		855	POPSTACK_TO (PL_mainstack);
		856
		857	/* unwind main stack */
		858	dounwind (-1);
		859	}
		860
		861	SvREFCNT_dec (GvSV (PL_defgv));
		862	SvREFCNT_dec (GvAV (PL_defgv));
		863	SvREFCNT_dec (GvSV (PL_errgv));
		864	SvREFCNT_dec (PL_defoutgv);
		865	SvREFCNT_dec (PL_rs);
		866	SvREFCNT_dec (GvSV (irsgv));
		867
		868	SvREFCNT_dec (PL_diehook);
		869	SvREFCNT_dec (PL_warnhook);
		870
		871	SvREFCNT_dec (coro->saved_deffh);
		872	SvREFCNT_dec (coro->throw);
		873
		874	coro_destroy_stacks (aTHX);
572	}	875	}
573		876
574	static void	877	static void
575	free_coro_mortal (pTHX)	878	free_coro_mortal (pTHX)
576	{	879	{
577	if (coro_mortal)	880	if (expect_true (coro_mortal))
578	{	881	{
579	SvREFCNT_dec (coro_mortal);	882	SvREFCNT_dec (coro_mortal);
580	coro_mortal = 0;	883	coro_mortal = 0;
581	}	884	}
582	}	885	}
583		886
		887	static int
		888	runops_trace (pTHX)
		889	{
		890	COP *oldcop = 0;
		891	int oldcxix = -2;
		892	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		893	coro_cctx *cctx = coro->cctx;
		894
		895	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		896	{
		897	PERL_ASYNC_CHECK ();
		898
		899	if (cctx->flags & CC_TRACE_ALL)
		900	{
		901	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		902	{
		903	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		904	SV **bot, **top;
		905	AV *av = newAV (); /* return values */
		906	SV **cb;
		907	dSP;
		908
		909	GV *gv = CvGV (cx->blk_sub.cv);
		910	SV *fullname = sv_2mortal (newSV (0));
		911	if (isGV (gv))
		912	gv_efullname3 (fullname, gv, 0);
		913
		914	bot = PL_stack_base + cx->blk_oldsp + 1;
		915	top = cx->blk_gimme == G_ARRAY ? SP + 1
		916	: cx->blk_gimme == G_SCALAR ? bot + 1
		917	: bot;
		918
		919	av_extend (av, top - bot);
		920	while (bot < top)
		921	av_push (av, SvREFCNT_inc (*bot++));
		922
		923	PL_runops = RUNOPS_DEFAULT;
		924	ENTER;
		925	SAVETMPS;
		926	EXTEND (SP, 3);
		927	PUSHMARK (SP);
		928	PUSHs (&PL_sv_no);
		929	PUSHs (fullname);
		930	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		931	PUTBACK;
		932	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		933	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		934	SPAGAIN;
		935	FREETMPS;
		936	LEAVE;
		937	PL_runops = runops_trace;
		938	}
		939
		940	if (oldcop != PL_curcop)
		941	{
		942	oldcop = PL_curcop;
		943
		944	if (PL_curcop != &PL_compiling)
		945	{
		946	SV **cb;
		947
		948	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		949	{
		950	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		951
		952	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		953	{
		954	runops_proc_t old_runops = PL_runops;
		955	dSP;
		956	GV *gv = CvGV (cx->blk_sub.cv);
		957	SV *fullname = sv_2mortal (newSV (0));
		958
		959	if (isGV (gv))
		960	gv_efullname3 (fullname, gv, 0);
		961
		962	PL_runops = RUNOPS_DEFAULT;
		963	ENTER;
		964	SAVETMPS;
		965	EXTEND (SP, 3);
		966	PUSHMARK (SP);
		967	PUSHs (&PL_sv_yes);
		968	PUSHs (fullname);
		969	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		970	PUTBACK;
		971	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		972	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		973	SPAGAIN;
		974	FREETMPS;
		975	LEAVE;
		976	PL_runops = runops_trace;
		977	}
		978
		979	oldcxix = cxstack_ix;
		980	}
		981
		982	if (cctx->flags & CC_TRACE_LINE)
		983	{
		984	dSP;
		985
		986	PL_runops = RUNOPS_DEFAULT;
		987	ENTER;
		988	SAVETMPS;
		989	EXTEND (SP, 3);
		990	PL_runops = RUNOPS_DEFAULT;
		991	PUSHMARK (SP);
		992	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		993	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		994	PUTBACK;
		995	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		996	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		997	SPAGAIN;
		998	FREETMPS;
		999	LEAVE;
		1000	PL_runops = runops_trace;
		1001	}
		1002	}
		1003	}
		1004	}
		1005	}
		1006
		1007	TAINT_NOT;
		1008	return 0;
		1009	}
		1010
584	/* inject a fake call to Coro::State::_cctx_init into the execution */	1011	/* inject a fake call to Coro::State::_cctx_init into the execution */
		1012	/* _cctx_init should be careful, as it could be called at almost any time */
		1013	/* during execution of a perl program */
585	static void NOINLINE	1014	static void NOINLINE
586	prepare_cctx (pTHX_ coro_cctx *cctx)	1015	cctx_prepare (pTHX_ coro_cctx *cctx)
587	{	1016	{
588	dSP;	1017	dSP;
589	LOGOP myop;	1018	LOGOP myop;
		1019
		1020	PL_top_env = &PL_start_env;
		1021
		1022	if (cctx->flags & CC_TRACE)
		1023	PL_runops = runops_trace;
590		1024
591	Zero (&myop, 1, LOGOP);	1025	Zero (&myop, 1, LOGOP);
592	myop.op_next = PL_op;	1026	myop.op_next = PL_op;
593	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1027	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
594		1028
…		…
600	PL_op = (OP *)&myop;	1034	PL_op = (OP *)&myop;
601	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1035	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
602	SPAGAIN;	1036	SPAGAIN;
603	}	1037	}
604		1038
		1039	/*
		1040	* this is a _very_ stripped down perl interpreter ;)
		1041	*/
605	static void	1042	static void
606	coro_run (void *arg)	1043	cctx_run (void *arg)
607	{	1044	{
608	dTHX;	1045	dTHX;
609		1046
610	/* coro_run is the alternative tail of transfer(), so unlock here. */	1047	/* cctx_run is the alternative tail of transfer(), so unlock here. */
611	UNLOCK;	1048	UNLOCK;
612		1049
613	/*	1050	/* we now skip the entersub that lead to transfer() */
614	* this is a _very_ stripped down perl interpreter ;)	1051	PL_op = PL_op->op_next;
615	*/
616	PL_top_env = &PL_start_env;
617		1052
618	/* inject call to cctx_init */	1053	/* inject a fake subroutine call to cctx_init */
619	prepare_cctx (aTHX_ (coro_cctx *)arg);	1054	cctx_prepare (aTHX_ (coro_cctx *)arg);
620		1055
621	/* somebody will hit me for both perl_run and PL_restartop */	1056	/* somebody or something will hit me for both perl_run and PL_restartop */
622	PL_restartop = PL_op;	1057	PL_restartop = PL_op;
623	perl_run (PL_curinterp);	1058	perl_run (PL_curinterp);
624		1059
625	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	1060	/*
626	abort ();	1061	* If perl-run returns we assume exit() was being called or the coro
		1062	* fell off the end, which seems to be the only valid (non-bug)
		1063	* reason for perl_run to return. We try to exit by jumping to the
		1064	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1065	* coroutine as Coro has no such concept
		1066	*/
		1067	PL_top_env = main_top_env;
		1068	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
627	}	1069	}
628		1070
629	static coro_cctx *	1071	static coro_cctx *
630	cctx_new ()	1072	cctx_new ()
631	{	1073	{
…		…
636	++cctx_count;	1078	++cctx_count;
637		1079
638	Newz (0, cctx, 1, coro_cctx);	1080	Newz (0, cctx, 1, coro_cctx);
639		1081
640	#if HAVE_MMAP	1082	#if HAVE_MMAP
641
642	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1083	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
643	/* mmap supposedly does allocate-on-write for us */	1084	/* mmap supposedly does allocate-on-write for us */
644	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1085	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
645		1086
646	if (cctx->sptr != (void *)-1)	1087	if (cctx->sptr != (void *)-1)
…		…
648	# if CORO_STACKGUARD	1089	# if CORO_STACKGUARD
649	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1090	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
650	# endif	1091	# endif
651	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1092	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
652	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1093	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
653	cctx->mapped = 1;	1094	cctx->flags |= CC_MAPPED;
654	}	1095	}
655	else	1096	else
656	#endif	1097	#endif
657	{	1098	{
658	cctx->ssize = coro_stacksize * (long)sizeof (long);	1099	cctx->ssize = coro_stacksize * (long)sizeof (long);
…		…
667	stack_start = cctx->sptr;	1108	stack_start = cctx->sptr;
668	stack_size = cctx->ssize;	1109	stack_size = cctx->ssize;
669	}	1110	}
670		1111
671	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1112	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
672	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);	1113	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
673		1114
674	return cctx;	1115	return cctx;
675	}	1116	}
676		1117
677	static void	1118	static void
…		…
685	#if CORO_USE_VALGRIND	1126	#if CORO_USE_VALGRIND
686	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1127	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
687	#endif	1128	#endif
688		1129
689	#if HAVE_MMAP	1130	#if HAVE_MMAP
690	if (cctx->mapped)	1131	if (cctx->flags & CC_MAPPED)
691	munmap (cctx->sptr, cctx->ssize);	1132	munmap (cctx->sptr, cctx->ssize);
692	else	1133	else
693	#endif	1134	#endif
694	Safefree (cctx->sptr);	1135	Safefree (cctx->sptr);
695		1136
696	Safefree (cctx);	1137	Safefree (cctx);
697	}	1138	}
698		1139
		1140	/* wether this cctx should be destructed */
		1141	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1142
699	static coro_cctx *	1143	static coro_cctx *
700	cctx_get (pTHX)	1144	cctx_get (pTHX)
701	{	1145	{
702	while (cctx_first)	1146	while (expect_true (cctx_first))
703	{	1147	{
704	coro_cctx *cctx = cctx_first;	1148	coro_cctx *cctx = cctx_first;
705	cctx_first = cctx->next;	1149	cctx_first = cctx->next;
706	--cctx_idle;	1150	--cctx_idle;
707		1151
708	if (cctx->ssize >= coro_stacksize)	1152	if (expect_true (!CCTX_EXPIRED (cctx)))
709	return cctx;	1153	return cctx;
710		1154
711	cctx_destroy (cctx);	1155	cctx_destroy (cctx);
712	}	1156	}
713		1157
714	PL_op = PL_op->op_next;
715	return cctx_new ();	1158	return cctx_new ();
716	}	1159	}
717		1160
718	static void	1161	static void
719	cctx_put (coro_cctx *cctx)	1162	cctx_put (coro_cctx *cctx)
720	{	1163	{
721	/* free another cctx if overlimit */	1164	/* free another cctx if overlimit */
722	if (cctx_idle >= MAX_IDLE_CCTX)	1165	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
723	{	1166	{
724	coro_cctx *first = cctx_first;	1167	coro_cctx *first = cctx_first;
725	cctx_first = first->next;	1168	cctx_first = first->next;
726	--cctx_idle;	1169	--cctx_idle;
727		1170
728	assert (!first->inuse);
729	cctx_destroy (first);	1171	cctx_destroy (first);
730	}	1172	}
731		1173
732	++cctx_idle;	1174	++cctx_idle;
733	cctx->next = cctx_first;	1175	cctx->next = cctx_first;
734	cctx_first = cctx;	1176	cctx_first = cctx;
735	}	1177	}
736		1178
737	/** coroutine switching *****************************************************/	1179	/** coroutine switching *****************************************************/
738		1180
739	/* never call directly, always through the coro_state_transfer global variable */	1181	static void
		1182	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1183	{
		1184	if (expect_true (prev != next))
		1185	{
		1186	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1187	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1188
		1189	if (expect_false (next->flags & CF_RUNNING))
		1190	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1191
		1192	if (expect_false (next->flags & CF_DESTROYED))
		1193	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1194
		1195	#if !PERL_VERSION_ATLEAST (5,10,0)
		1196	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1197	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1198	#endif
		1199	}
		1200	}
		1201
		1202	/* always use the TRANSFER macro */
740	static void NOINLINE	1203	static void NOINLINE
741	transfer (pTHX_ struct coro *prev, struct coro *next)	1204	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
742	{	1205	{
743	dSTACKLEVEL;	1206	dSTACKLEVEL;
		1207	static volatile int has_throw;
744		1208
745	/* sometimes transfer is only called to set idle_sp */	1209	/* sometimes transfer is only called to set idle_sp */
746	if (!next)	1210	if (expect_false (!next))
747	{	1211	{
748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1212	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
749	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1213	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
750	}	1214	}
751	else if (prev != next)	1215	else if (expect_true (prev != next))
752	{	1216	{
753	coro_cctx *prev__cctx;	1217	coro_cctx *prev__cctx;
754		1218
755	if (prev->flags & CF_NEW)	1219	if (expect_false (prev->flags & CF_NEW))
756	{	1220	{
757	/* create a new empty context */	1221	/* create a new empty context */
758	Newz (0, prev->cctx, 1, coro_cctx);	1222	Newz (0, prev->cctx, 1, coro_cctx);
759	prev->cctx->inuse = 1;
760	prev->flags &= ~CF_NEW;	1223	prev->flags &= ~CF_NEW;
761	prev->flags |= CF_RUNNING;	1224	prev->flags |= CF_RUNNING;
762	}	1225	}
763		1226
764	/*TODO: must not croak here */
765	if (!prev->flags & CF_RUNNING)
766	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
767
768	if (next->flags & CF_RUNNING)
769	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
770
771	if (next->flags & CF_DESTROYED)
772	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
773
774	prev->flags &= ~CF_RUNNING;	1227	prev->flags &= ~CF_RUNNING;
775	next->flags |= CF_RUNNING;	1228	next->flags |= CF_RUNNING;
776		1229
777	LOCK;	1230	LOCK;
778		1231
		1232	/* first get rid of the old state */
		1233	save_perl (aTHX_ prev);
		1234
779	if (next->flags & CF_NEW)	1235	if (expect_false (next->flags & CF_NEW))
780	{	1236	{
781	/* need to start coroutine */	1237	/* need to start coroutine */
782	next->flags &= ~CF_NEW;	1238	next->flags &= ~CF_NEW;
783	/* first get rid of the old state */
784	save_perl (aTHX_ prev);
785	/* setup coroutine call */	1239	/* setup coroutine call */
786	setup_coro (aTHX_ next);	1240	coro_setup (aTHX_ next);
787	/* need a new stack */
788	assert (!next->cctx);
789	}	1241	}
790	else	1242	else
791	{
792	/* coroutine already started */
793	save_perl (aTHX_ prev);
794	load_perl (aTHX_ next);	1243	load_perl (aTHX_ next);
795	}
796		1244
797	prev__cctx = prev->cctx;	1245	prev__cctx = prev->cctx;
798		1246
799	/* possibly "free" the cctx */	1247	/* possibly "free" the cctx */
		1248	if (expect_true (
800	if (prev__cctx->idle_sp == STACKLEVEL)	1249	prev__cctx->idle_sp == STACKLEVEL
		1250	&& !(prev__cctx->flags & CC_TRACE)
		1251	&& !force_cctx
		1252	))
801	{	1253	{
802	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1254	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
803	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1255	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
804		1256
805	prev->cctx = 0;	1257	prev->cctx = 0;
806		1258
		1259	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1260	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1261	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1262	if (!next->cctx)
		1263	next->cctx = cctx_get (aTHX);
		1264
807	cctx_put (prev__cctx);	1265	cctx_put (prev__cctx);
808	prev__cctx->inuse = 0;
809	}	1266	}
810		1267
		1268	++next->usecount;
		1269
811	if (!next->cctx)	1270	if (expect_true (!next->cctx))
812	{
813	next->cctx = cctx_get (aTHX);	1271	next->cctx = cctx_get (aTHX);
814	assert (!next->cctx->inuse);
815	next->cctx->inuse = 1;
816	}
817		1272
		1273	has_throw = !!next->throw;
		1274
818	if (prev__cctx != next->cctx)	1275	if (expect_false (prev__cctx != next->cctx))
819	{	1276	{
820	prev__cctx->top_env = PL_top_env;	1277	prev__cctx->top_env = PL_top_env;
821	PL_top_env = next->cctx->top_env;	1278	PL_top_env = next->cctx->top_env;
822	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1279	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
823	}	1280	}
824		1281
825	free_coro_mortal (aTHX);	1282	free_coro_mortal (aTHX);
826	UNLOCK;	1283	UNLOCK;
		1284
		1285	if (expect_false (has_throw))
		1286	{
		1287	struct coro *coro = SvSTATE (coro_current);
		1288
		1289	if (coro->throw)
		1290	{
		1291	SV *exception = coro->throw;
		1292	coro->throw = 0;
		1293	sv_setsv (ERRSV, exception);
		1294	croak (0);
		1295	}
		1296	}
827	}	1297	}
828	}	1298	}
829		1299
830	struct transfer_args	1300	struct transfer_args
831	{	1301	{
832	struct coro *prev, *next;	1302	struct coro *prev, *next;
833	};	1303	};
834		1304
		1305	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
835	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)	1306	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
836		1307
837	/** high level stuff ********************************************************/	1308	/** high level stuff ********************************************************/
838		1309
839	static int	1310	static int
840	coro_state_destroy (pTHX_ struct coro *coro)	1311	coro_state_destroy (pTHX_ struct coro *coro)
…		…
857		1328
858	if (coro->mainstack && coro->mainstack != main_mainstack)	1329	if (coro->mainstack && coro->mainstack != main_mainstack)
859	{	1330	{
860	struct coro temp;	1331	struct coro temp;
861		1332
862	assert (!(coro->flags & CF_RUNNING));
863
864	Zero (&temp, 1, struct coro);
865	temp.save = CORO_SAVE_ALL;
866
867	if (coro->flags & CF_RUNNING)	1333	if (coro->flags & CF_RUNNING)
868	croak ("FATAL: tried to destroy currently running coroutine");	1334	croak ("FATAL: tried to destroy currently running coroutine");
869		1335
870	save_perl (aTHX_ &temp);	1336	save_perl (aTHX_ &temp);
871	load_perl (aTHX_ coro);	1337	load_perl (aTHX_ coro);
872		1338
873	coro_destroy_stacks (aTHX);	1339	coro_destroy (aTHX_ coro);
874		1340
875	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */	1341	load_perl (aTHX_ &temp);
876		1342
877	coro->mainstack = 0;	1343	coro->slot = 0;
878	}	1344	}
879		1345
880	cctx_destroy (coro->cctx);	1346	cctx_destroy (coro->cctx);
881	SvREFCNT_dec (coro->args);	1347	SvREFCNT_dec (coro->args);
882		1348
		1349	if (coro->next) coro->next->prev = coro->prev;
		1350	if (coro->prev) coro->prev->next = coro->next;
		1351	if (coro == coro_first) coro_first = coro->next;
		1352
883	return 1;	1353	return 1;
884	}	1354	}
885		1355
886	static int	1356	static int
887	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1357	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
888	{	1358	{
889	struct coro *coro = (struct coro *)mg->mg_ptr;	1359	struct coro *coro = (struct coro *)mg->mg_ptr;
890	mg->mg_ptr = 0;	1360	mg->mg_ptr = 0;
		1361
		1362	coro->hv = 0;
891		1363
892	if (--coro->refcnt < 0)	1364	if (--coro->refcnt < 0)
893	{	1365	{
894	coro_state_destroy (aTHX_ coro);	1366	coro_state_destroy (aTHX_ coro);
895	Safefree (coro);	1367	Safefree (coro);
…		…
917	#else	1389	#else
918	# define MGf_DUP 0	1390	# define MGf_DUP 0
919	#endif	1391	#endif
920	};	1392	};
921		1393
922	static struct coro *
923	SvSTATE_ (pTHX_ SV *coro)
924	{
925	HV *stash;
926	MAGIC *mg;
927
928	if (SvROK (coro))
929	coro = SvRV (coro);
930
931	stash = SvSTASH (coro);
932	if (stash != coro_stash && stash != coro_state_stash)
933	{
934	/* very slow, but rare, check */
935	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
936	croak ("Coro::State object required");
937	}
938
939	mg = CORO_MAGIC (coro);
940	return (struct coro *)mg->mg_ptr;
941	}
942
943	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
944
945	static void	1394	static void
946	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1395	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
947	{	1396	{
948	ta->prev = SvSTATE (prev_sv);	1397	ta->prev = SvSTATE (prev_sv);
949	ta->next = SvSTATE (next_sv);	1398	ta->next = SvSTATE (next_sv);
		1399	TRANSFER_CHECK (*ta);
950	}	1400	}
951		1401
952	static void	1402	static void
953	api_transfer (SV *prev_sv, SV *next_sv)	1403	api_transfer (SV *prev_sv, SV *next_sv)
954	{	1404	{
955	dTHX;	1405	dTHX;
956	struct transfer_args ta;	1406	struct transfer_args ta;
957		1407
958	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1408	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
959	TRANSFER (ta);	1409	TRANSFER (ta, 1);
960	}
961
962	static int
963	api_save (SV *coro_sv, int new_save)
964	{
965	dTHX;
966	struct coro *coro = SvSTATE (coro_sv);
967	int old_save = coro->save;
968
969	if (new_save >= 0)
970	coro->save = new_save;
971
972	return old_save;
973	}	1410	}
974		1411
975	/** Coro ********************************************************************/	1412	/** Coro ********************************************************************/
976		1413
977	static void	1414	static void
…		…
979	{	1416	{
980	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1417	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
981	}	1418	}
982		1419
983	static SV *	1420	static SV *
984	coro_deq (pTHX_ int min_prio)	1421	coro_deq (pTHX)
985	{	1422	{
986	int prio = PRIO_MAX - PRIO_MIN;	1423	int prio;
987		1424
988	min_prio -= PRIO_MIN;
989	if (min_prio < 0)
990	min_prio = 0;
991
992	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1425	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
993	if (AvFILLp (coro_ready [prio]) >= 0)	1426	if (AvFILLp (coro_ready [prio]) >= 0)
994	return av_shift (coro_ready [prio]);	1427	return av_shift (coro_ready [prio]);
995		1428
996	return 0;	1429	return 0;
997	}	1430	}
…		…
999	static int	1432	static int
1000	api_ready (SV *coro_sv)	1433	api_ready (SV *coro_sv)
1001	{	1434	{
1002	dTHX;	1435	dTHX;
1003	struct coro *coro;	1436	struct coro *coro;
		1437	SV *sv_hook;
		1438	void (*xs_hook)(void);
1004		1439
1005	if (SvROK (coro_sv))	1440	if (SvROK (coro_sv))
1006	coro_sv = SvRV (coro_sv);	1441	coro_sv = SvRV (coro_sv);
1007		1442
1008	coro = SvSTATE (coro_sv);	1443	coro = SvSTATE (coro_sv);
…		…
1011	return 0;	1446	return 0;
1012		1447
1013	coro->flags |= CF_READY;	1448	coro->flags |= CF_READY;
1014		1449
1015	LOCK;	1450	LOCK;
		1451
		1452	sv_hook = coro_nready ? 0 : coro_readyhook;
		1453	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1454
1016	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));	1455	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1017	++coro_nready;	1456	++coro_nready;
		1457
1018	UNLOCK;	1458	UNLOCK;
		1459
		1460	if (sv_hook)
		1461	{
		1462	dSP;
		1463
		1464	ENTER;
		1465	SAVETMPS;
		1466
		1467	PUSHMARK (SP);
		1468	PUTBACK;
		1469	call_sv (sv_hook, G_DISCARD);
		1470	SPAGAIN;
		1471
		1472	FREETMPS;
		1473	LEAVE;
		1474	}
		1475
		1476	if (xs_hook)
		1477	xs_hook ();
1019		1478
1020	return 1;	1479	return 1;
1021	}	1480	}
1022		1481
1023	static int	1482	static int
…		…
1033	SV *prev_sv, *next_sv;	1492	SV *prev_sv, *next_sv;
1034		1493
1035	for (;;)	1494	for (;;)
1036	{	1495	{
1037	LOCK;	1496	LOCK;
1038	next_sv = coro_deq (aTHX_ PRIO_MIN);	1497	next_sv = coro_deq (aTHX);
1039		1498
1040	/* nothing to schedule: call the idle handler */	1499	/* nothing to schedule: call the idle handler */
1041	if (!next_sv)	1500	if (expect_false (!next_sv))
1042	{	1501	{
1043	dSP;	1502	dSP;
1044	UNLOCK;	1503	UNLOCK;
1045		1504
1046	ENTER;	1505	ENTER;
1047	SAVETMPS;	1506	SAVETMPS;
1048		1507
1049	PUSHMARK (SP);	1508	PUSHMARK (SP);
1050	PUTBACK;	1509	PUTBACK;
1051	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1510	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1511	SPAGAIN;
1052		1512
1053	FREETMPS;	1513	FREETMPS;
1054	LEAVE;	1514	LEAVE;
1055	continue;	1515	continue;
1056	}	1516	}
1057		1517
1058	ta->next = SvSTATE (next_sv);	1518	ta->next = SvSTATE (next_sv);
1059		1519
1060	/* cannot transfer to destroyed coros, skip and look for next */	1520	/* cannot transfer to destroyed coros, skip and look for next */
1061	if (ta->next->flags & CF_DESTROYED)	1521	if (expect_false (ta->next->flags & CF_DESTROYED))
1062	{	1522	{
1063	UNLOCK;	1523	UNLOCK;
1064	SvREFCNT_dec (next_sv);	1524	SvREFCNT_dec (next_sv);
1065	/* coro_nready is already taken care of by destroy */	1525	/* coro_nready is already taken care of by destroy */
1066	continue;	1526	continue;
…		…
1071	break;	1531	break;
1072	}	1532	}
1073		1533
1074	/* free this only after the transfer */	1534	/* free this only after the transfer */
1075	prev_sv = SvRV (coro_current);	1535	prev_sv = SvRV (coro_current);
1076	SvRV_set (coro_current, next_sv);
1077	ta->prev = SvSTATE (prev_sv);	1536	ta->prev = SvSTATE (prev_sv);
1078		1537	TRANSFER_CHECK (*ta);
1079	assert (ta->next->flags & CF_READY);	1538	assert (ta->next->flags & CF_READY);
1080	ta->next->flags &= ~CF_READY;	1539	ta->next->flags &= ~CF_READY;
		1540	SvRV_set (coro_current, next_sv);
1081		1541
1082	LOCK;	1542	LOCK;
1083	free_coro_mortal (aTHX);	1543	free_coro_mortal (aTHX);
1084	coro_mortal = prev_sv;	1544	coro_mortal = prev_sv;
1085	UNLOCK;	1545	UNLOCK;
…		…
1111	{	1571	{
1112	dTHX;	1572	dTHX;
1113	struct transfer_args ta;	1573	struct transfer_args ta;
1114		1574
1115	prepare_schedule (aTHX_ &ta);	1575	prepare_schedule (aTHX_ &ta);
1116	TRANSFER (ta);	1576	TRANSFER (ta, 1);
1117	}	1577	}
1118		1578
1119	static int	1579	static int
1120	api_cede (void)	1580	api_cede (void)
1121	{	1581	{
1122	dTHX;	1582	dTHX;
1123	struct transfer_args ta;	1583	struct transfer_args ta;
1124		1584
1125	prepare_cede (aTHX_ &ta);	1585	prepare_cede (aTHX_ &ta);
1126		1586
1127	if (ta.prev != ta.next)	1587	if (expect_true (ta.prev != ta.next))
1128	{	1588	{
1129	TRANSFER (ta);	1589	TRANSFER (ta, 1);
1130	return 1;	1590	return 1;
1131	}	1591	}
1132	else	1592	else
1133	return 0;	1593	return 0;
1134	}	1594	}
…		…
1139	dTHX;	1599	dTHX;
1140	struct transfer_args ta;	1600	struct transfer_args ta;
1141		1601
1142	if (prepare_cede_notself (aTHX_ &ta))	1602	if (prepare_cede_notself (aTHX_ &ta))
1143	{	1603	{
1144	TRANSFER (ta);	1604	TRANSFER (ta, 1);
1145	return 1;	1605	return 1;
1146	}	1606	}
1147	else	1607	else
1148	return 0;	1608	return 0;
1149	}	1609	}
1150		1610
		1611	static void
		1612	api_trace (SV *coro_sv, int flags)
		1613	{
		1614	dTHX;
		1615	struct coro *coro = SvSTATE (coro_sv);
		1616
		1617	if (flags & CC_TRACE)
		1618	{
		1619	if (!coro->cctx)
		1620	coro->cctx = cctx_new ();
		1621	else if (!(coro->cctx->flags & CC_TRACE))
		1622	croak ("cannot enable tracing on coroutine with custom stack");
		1623
		1624	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1625	}
		1626	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1627	{
		1628	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1629
		1630	if (coro->flags & CF_RUNNING)
		1631	PL_runops = RUNOPS_DEFAULT;
		1632	else
		1633	coro->slot->runops = RUNOPS_DEFAULT;
		1634	}
		1635	}
		1636
		1637	static int
		1638	coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
		1639	{
		1640	AV *padlist;
		1641	AV *av = (AV *)mg->mg_obj;
		1642
		1643	abort ();
		1644
		1645	return 0;
		1646	}
		1647
		1648	static MGVTBL coro_gensub_vtbl = {
		1649	0, 0, 0, 0,
		1650	coro_gensub_free
		1651	};
		1652
		1653	/*****************************************************************************/
		1654	/* PerlIO::cede */
		1655
		1656	typedef struct
		1657	{
		1658	PerlIOBuf base;
		1659	NV next, every;
		1660	} PerlIOCede;
		1661
		1662	static IV
		1663	PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
		1664	{
		1665	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1666
		1667	self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
		1668	self->next = nvtime () + self->every;
		1669
		1670	return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
		1671	}
		1672
		1673	static SV *
		1674	PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
		1675	{
		1676	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1677
		1678	return newSVnv (self->every);
		1679	}
		1680
		1681	static IV
		1682	PerlIOCede_flush (pTHX_ PerlIO *f)
		1683	{
		1684	PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
		1685	double now = nvtime ();
		1686
		1687	if (now >= self->next)
		1688	{
		1689	api_cede ();
		1690	self->next = now + self->every;
		1691	}
		1692
		1693	return PerlIOBuf_flush (f);
		1694	}
		1695
		1696	static PerlIO_funcs PerlIO_cede =
		1697	{
		1698	sizeof(PerlIO_funcs),
		1699	"cede",
		1700	sizeof(PerlIOCede),
		1701	PERLIO_K_DESTRUCT | PERLIO_K_RAW,
		1702	PerlIOCede_pushed,
		1703	PerlIOBuf_popped,
		1704	PerlIOBuf_open,
		1705	PerlIOBase_binmode,
		1706	PerlIOCede_getarg,
		1707	PerlIOBase_fileno,
		1708	PerlIOBuf_dup,
		1709	PerlIOBuf_read,
		1710	PerlIOBuf_unread,
		1711	PerlIOBuf_write,
		1712	PerlIOBuf_seek,
		1713	PerlIOBuf_tell,
		1714	PerlIOBuf_close,
		1715	PerlIOCede_flush,
		1716	PerlIOBuf_fill,
		1717	PerlIOBase_eof,
		1718	PerlIOBase_error,
		1719	PerlIOBase_clearerr,
		1720	PerlIOBase_setlinebuf,
		1721	PerlIOBuf_get_base,
		1722	PerlIOBuf_bufsiz,
		1723	PerlIOBuf_get_ptr,
		1724	PerlIOBuf_get_cnt,
		1725	PerlIOBuf_set_ptrcnt,
		1726	};
		1727
		1728
1151	MODULE = Coro::State PACKAGE = Coro::State	1729	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1152		1730
1153	PROTOTYPES: DISABLE	1731	PROTOTYPES: DISABLE
1154		1732
1155	BOOT:	1733	BOOT:
1156	{	1734	{
1157	#ifdef USE_ITHREADS	1735	#ifdef USE_ITHREADS
1158	MUTEX_INIT (&coro_mutex);	1736	MUTEX_INIT (&coro_mutex);
1159	#endif	1737	#endif
1160	BOOT_PAGESIZE;	1738	BOOT_PAGESIZE;
1161		1739
		1740	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1741	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1742
		1743	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1744	orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1745	orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
		1746
		1747	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1748	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1749	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1750
1162	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1751	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1163		1752
		1753	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1754	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1164	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1755	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1165	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1166	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1167	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1168	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1756	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1169		1757
1170	main_mainstack = PL_mainstack;	1758	main_mainstack = PL_mainstack;
		1759	main_top_env = PL_top_env;
1171		1760
		1761	while (main_top_env->je_prev)
		1762	main_top_env = main_top_env->je_prev;
		1763
1172	coroapi.ver = CORO_API_VERSION;	1764	coroapi.ver = CORO_API_VERSION;
		1765	coroapi.rev = CORO_API_REVISION;
1173	coroapi.transfer = api_transfer;	1766	coroapi.transfer = api_transfer;
		1767
		1768	{
		1769	SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
		1770
		1771	if (!svp) croak ("Time::HiRes is required");
		1772	if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
		1773
		1774	nvtime = INT2PTR (double (*)(), SvIV (*svp));
		1775	}
1174		1776
1175	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1777	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1176	}	1778	}
1177		1779
1178	SV *	1780	SV *
1179	new (char *klass, ...)	1781	new (char *klass, ...)
1180	CODE:	1782	CODE:
1181	{	1783	{
1182	struct coro *coro;	1784	struct coro *coro;
		1785	MAGIC *mg;
1183	HV *hv;	1786	HV *hv;
1184	int i;	1787	int i;
1185		1788
1186	Newz (0, coro, 1, struct coro);	1789	Newz (0, coro, 1, struct coro);
1187	coro->args = newAV ();	1790	coro->args = newAV ();
1188	coro->save = CORO_SAVE_ALL;
1189	coro->flags = CF_NEW;	1791	coro->flags = CF_NEW;
1190		1792
		1793	if (coro_first) coro_first->prev = coro;
		1794	coro->next = coro_first;
		1795	coro_first = coro;
		1796
1191	hv = newHV ();	1797	coro->hv = hv = newHV ();
1192	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1798	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1799	mg->mg_flags |= MGf_DUP;
1193	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1800	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1194		1801
		1802	av_extend (coro->args, items - 1);
1195	for (i = 1; i < items; i++)	1803	for (i = 1; i < items; i++)
1196	av_push (coro->args, newSVsv (ST (i)));	1804	av_push (coro->args, newSVsv (ST (i)));
1197	}	1805	}
1198	OUTPUT:	1806	OUTPUT:
1199	RETVAL	1807	RETVAL
1200		1808
1201	int	1809	# these not obviously related functions are all rolled into the same xs
1202	save (SV *coro, int new_save = -1)	1810	# function to increase chances that they all will call transfer with the same
1203	CODE:	1811	# stack offset
1204	RETVAL = api_save (coro, new_save);
1205	OUTPUT:
1206	RETVAL
1207
1208	void	1812	void
1209	_set_stacklevel (...)	1813	_set_stacklevel (...)
1210	ALIAS:	1814	ALIAS:
1211	Coro::State::transfer = 1	1815	Coro::State::transfer = 1
1212	Coro::schedule = 2	1816	Coro::schedule = 2
…		…
1214	Coro::cede_notself = 4	1818	Coro::cede_notself = 4
1215	CODE:	1819	CODE:
1216	{	1820	{
1217	struct transfer_args ta;	1821	struct transfer_args ta;
1218		1822
		1823	PUTBACK;
1219	switch (ix)	1824	switch (ix)
1220	{	1825	{
1221	case 0:	1826	case 0:
1222	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1827	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1223	ta.next = 0;	1828	ta.next = 0;
…		…
1242	if (!prepare_cede_notself (aTHX_ &ta))	1847	if (!prepare_cede_notself (aTHX_ &ta))
1243	XSRETURN_EMPTY;	1848	XSRETURN_EMPTY;
1244		1849
1245	break;	1850	break;
1246	}	1851	}
		1852	SPAGAIN;
1247		1853
1248	BARRIER;	1854	BARRIER;
		1855	PUTBACK;
1249	TRANSFER (ta);	1856	TRANSFER (ta, 0);
1250		1857	SPAGAIN; /* might be the sp of a different coroutine now */
1251	if (GIMME_V != G_VOID && ta.next != ta.prev)	1858	/* be extra careful not to ever do anything after TRANSFER */
1252	XSRETURN_YES;
1253	}	1859	}
1254		1860
1255	bool	1861	bool
1256	_destroy (SV *coro_sv)	1862	_destroy (SV *coro_sv)
1257	CODE:	1863	CODE:
1258	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	1864	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1259	OUTPUT:	1865	OUTPUT:
1260	RETVAL	1866	RETVAL
1261		1867
1262	void	1868	void
1263	_exit (code)	1869	_exit (int code)
1264	int code
1265	PROTOTYPE: $	1870	PROTOTYPE: $
1266	CODE:	1871	CODE:
1267	_exit (code);	1872	_exit (code);
1268		1873
1269	int	1874	int
…		…
1287	CODE:	1892	CODE:
1288	RETVAL = cctx_idle;	1893	RETVAL = cctx_idle;
1289	OUTPUT:	1894	OUTPUT:
1290	RETVAL	1895	RETVAL
1291		1896
		1897	void
		1898	list ()
		1899	PPCODE:
		1900	{
		1901	struct coro *coro;
		1902	for (coro = coro_first; coro; coro = coro->next)
		1903	if (coro->hv)
		1904	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1905	}
		1906
		1907	void
		1908	call (Coro::State coro, SV *coderef)
		1909	ALIAS:
		1910	eval = 1
		1911	CODE:
		1912	{
		1913	if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
		1914	{
		1915	struct coro temp;
		1916
		1917	if (!(coro->flags & CF_RUNNING))
		1918	{
		1919	PUTBACK;
		1920	save_perl (aTHX_ &temp);
		1921	load_perl (aTHX_ coro);
		1922	}
		1923
		1924	{
		1925	dSP;
		1926	ENTER;
		1927	SAVETMPS;
		1928	PUTBACK;
		1929	PUSHSTACK;
		1930	PUSHMARK (SP);
		1931
		1932	if (ix)
		1933	eval_sv (coderef, 0);
		1934	else
		1935	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1936
		1937	POPSTACK;
		1938	SPAGAIN;
		1939	FREETMPS;
		1940	LEAVE;
		1941	PUTBACK;
		1942	}
		1943
		1944	if (!(coro->flags & CF_RUNNING))
		1945	{
		1946	save_perl (aTHX_ coro);
		1947	load_perl (aTHX_ &temp);
		1948	SPAGAIN;
		1949	}
		1950	}
		1951	}
		1952
		1953	SV *
		1954	is_ready (Coro::State coro)
		1955	PROTOTYPE: $
		1956	ALIAS:
		1957	is_ready = CF_READY
		1958	is_running = CF_RUNNING
		1959	is_new = CF_NEW
		1960	is_destroyed = CF_DESTROYED
		1961	CODE:
		1962	RETVAL = boolSV (coro->flags & ix);
		1963	OUTPUT:
		1964	RETVAL
		1965
		1966	void
		1967	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1968
		1969	SV *
		1970	has_cctx (Coro::State coro)
		1971	PROTOTYPE: $
		1972	CODE:
		1973	RETVAL = boolSV (!!coro->cctx);
		1974	OUTPUT:
		1975	RETVAL
		1976
		1977	int
		1978	is_traced (Coro::State coro)
		1979	PROTOTYPE: $
		1980	CODE:
		1981	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1982	OUTPUT:
		1983	RETVAL
		1984
		1985	IV
		1986	rss (Coro::State coro)
		1987	PROTOTYPE: $
		1988	ALIAS:
		1989	usecount = 1
		1990	CODE:
		1991	switch (ix)
		1992	{
		1993	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1994	case 1: RETVAL = coro->usecount; break;
		1995	}
		1996	OUTPUT:
		1997	RETVAL
		1998
		1999	void
		2000	force_cctx ()
		2001	CODE:
		2002	struct coro *coro = SvSTATE (coro_current);
		2003	coro->cctx->idle_sp = 0;
		2004
		2005	void
		2006	throw (Coro::State self, SV *throw = &PL_sv_undef)
		2007	PROTOTYPE: $;$
		2008	CODE:
		2009	SvREFCNT_dec (self->throw);
		2010	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		2011
		2012	void
		2013	swap_defsv (Coro::State self)
		2014	PROTOTYPE: $
		2015	ALIAS:
		2016	swap_defav = 1
		2017	CODE:
		2018	if (!self->slot)
		2019	croak ("cannot swap state with coroutine that has no saved state");
		2020	else
		2021	{
		2022	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		2023	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		2024
		2025	SV *tmp = *src; *src = *dst; *dst = tmp;
		2026	}
		2027
1292	MODULE = Coro::State PACKAGE = Coro	2028	MODULE = Coro::State PACKAGE = Coro
1293		2029
1294	BOOT:	2030	BOOT:
1295	{	2031	{
1296	int i;	2032	int i;
1297		2033
		2034	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		2035	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		2036	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		2037
		2038	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		2039	SvREADONLY_on (coro_current);
		2040
1298	coro_stash = gv_stashpv ("Coro", TRUE);	2041	coro_stash = gv_stashpv ("Coro", TRUE);
1299		2042
1300	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	2043	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1301	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	2044	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1302	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	2045	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1303	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	2046	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1304	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	2047	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1305	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	2048	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1306		2049
1307	coro_current = get_sv ("Coro::current", FALSE);
1308	SvREADONLY_on (coro_current);
1309
1310	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	2050	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1311	coro_ready[i] = newAV ();	2051	coro_ready[i] = newAV ();
1312		2052
1313	{	2053	{
1314	SV *sv = perl_get_sv("Coro::API", 1);	2054	SV *sv = perl_get_sv ("Coro::API", TRUE);
		2055	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1315		2056
1316	coroapi.schedule = api_schedule;	2057	coroapi.schedule = api_schedule;
1317	coroapi.save = api_save;
1318	coroapi.cede = api_cede;	2058	coroapi.cede = api_cede;
1319	coroapi.cede_notself = api_cede_notself;	2059	coroapi.cede_notself = api_cede_notself;
1320	coroapi.ready = api_ready;	2060	coroapi.ready = api_ready;
1321	coroapi.is_ready = api_is_ready;	2061	coroapi.is_ready = api_is_ready;
1322	coroapi.nready = &coro_nready;	2062	coroapi.nready = &coro_nready;
…		…
1332	_set_current (SV *current)	2072	_set_current (SV *current)
1333	PROTOTYPE: $	2073	PROTOTYPE: $
1334	CODE:	2074	CODE:
1335	SvREFCNT_dec (SvRV (coro_current));	2075	SvREFCNT_dec (SvRV (coro_current));
1336	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	2076	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		2077
		2078	void
		2079	_set_readyhook (SV *hook)
		2080	PROTOTYPE: $
		2081	CODE:
		2082	LOCK;
		2083	SvREFCNT_dec (coro_readyhook);
		2084	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		2085	UNLOCK;
1337		2086
1338	int	2087	int
1339	prio (Coro::State coro, int newprio = 0)	2088	prio (Coro::State coro, int newprio = 0)
1340	ALIAS:	2089	ALIAS:
1341	nice = 1	2090	nice = 1
…		…
1363	CODE:	2112	CODE:
1364	RETVAL = boolSV (api_ready (self));	2113	RETVAL = boolSV (api_ready (self));
1365	OUTPUT:	2114	OUTPUT:
1366	RETVAL	2115	RETVAL
1367		2116
1368	SV *
1369	is_ready (SV *self)
1370	PROTOTYPE: $
1371	CODE:
1372	RETVAL = boolSV (api_is_ready (self));
1373	OUTPUT:
1374	RETVAL
1375
1376	int	2117	int
1377	nready (...)	2118	nready (...)
1378	PROTOTYPE:	2119	PROTOTYPE:
1379	CODE:	2120	CODE:
1380	RETVAL = coro_nready;	2121	RETVAL = coro_nready;
1381	OUTPUT:	2122	OUTPUT:
1382	RETVAL	2123	RETVAL
1383		2124
		2125	# for async_pool speedup
		2126	void
		2127	_pool_1 (SV *cb)
		2128	CODE:
		2129	{
		2130	struct coro *coro = SvSTATE (coro_current);
		2131	HV *hv = (HV *)SvRV (coro_current);
		2132	AV *defav = GvAV (PL_defgv);
		2133	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		2134	AV *invoke_av;
		2135	int i, len;
		2136
		2137	if (!invoke)
		2138	{
		2139	SV *old = PL_diehook;
		2140	PL_diehook = 0;
		2141	SvREFCNT_dec (old);
		2142	croak ("\3async_pool terminate\2\n");
		2143	}
		2144
		2145	SvREFCNT_dec (coro->saved_deffh);
		2146	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		2147
		2148	hv_store (hv, "desc", sizeof ("desc") - 1,
		2149	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		2150
		2151	invoke_av = (AV *)SvRV (invoke);
		2152	len = av_len (invoke_av);
		2153
		2154	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		2155
		2156	if (len > 0)
		2157	{
		2158	av_fill (defav, len - 1);
		2159	for (i = 0; i < len; ++i)
		2160	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		2161	}
		2162
		2163	SvREFCNT_dec (invoke);
		2164	}
		2165
		2166	void
		2167	_pool_2 (SV *cb)
		2168	CODE:
		2169	{
		2170	struct coro *coro = SvSTATE (coro_current);
		2171
		2172	sv_setsv (cb, &PL_sv_undef);
		2173
		2174	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		2175	coro->saved_deffh = 0;
		2176
		2177	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		2178	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2179	{
		2180	SV *old = PL_diehook;
		2181	PL_diehook = 0;
		2182	SvREFCNT_dec (old);
		2183	croak ("\3async_pool terminate\2\n");
		2184	}
		2185
		2186	av_clear (GvAV (PL_defgv));
		2187	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		2188	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		2189
		2190	coro->prio = 0;
		2191
		2192	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2193	api_trace (coro_current, 0);
		2194
		2195	av_push (av_async_pool, newSVsv (coro_current));
		2196	}
		2197
		2198	#if 0
		2199
		2200	void
		2201	_generator_call (...)
		2202	PROTOTYPE: @
		2203	PPCODE:
		2204	fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
		2205	xxxx
		2206	abort ();
		2207
		2208	SV *
		2209	gensub (SV *sub, ...)
		2210	PROTOTYPE: &;@
		2211	CODE:
		2212	{
		2213	struct coro *coro;
		2214	MAGIC *mg;
		2215	CV *xcv;
		2216	CV *ncv = (CV *)newSV_type (SVt_PVCV);
		2217	int i;
		2218
		2219	CvGV (ncv) = CvGV (cv);
		2220	CvFILE (ncv) = CvFILE (cv);
		2221
		2222	Newz (0, coro, 1, struct coro);
		2223	coro->args = newAV ();
		2224	coro->flags = CF_NEW;
		2225
		2226	av_extend (coro->args, items - 1);
		2227	for (i = 1; i < items; i++)
		2228	av_push (coro->args, newSVsv (ST (i)));
		2229
		2230	CvISXSUB_on (ncv);
		2231	CvXSUBANY (ncv).any_ptr = (void *)coro;
		2232
		2233	xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
		2234
		2235	CvXSUB (ncv) = CvXSUB (xcv);
		2236	CvANON_on (ncv);
		2237
		2238	mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
		2239	RETVAL = newRV_noinc ((SV *)ncv);
		2240	}
		2241	OUTPUT:
		2242	RETVAL
		2243
		2244	#endif
		2245
		2246
1384	MODULE = Coro::State PACKAGE = Coro::AIO	2247	MODULE = Coro::State PACKAGE = Coro::AIO
1385		2248
1386	SV *	2249	SV *
1387	_get_state ()	2250	_get_state ()
1388	CODE:	2251	CODE:
…		…
1413	PL_laststype = data->laststype;	2276	PL_laststype = data->laststype;
1414	PL_laststatval = data->laststatval;	2277	PL_laststatval = data->laststatval;
1415	PL_statcache = data->statcache;	2278	PL_statcache = data->statcache;
1416	}	2279	}
1417		2280
		2281
		2282	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2283
		2284	BOOT:
		2285	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2286
		2287	SV *
		2288	_schedule (...)
		2289	PROTOTYPE: @
		2290	CODE:
		2291	{
		2292	static int incede;
		2293
		2294	api_cede_notself ();
		2295
		2296	++incede;
		2297	while (coro_nready >= incede && api_cede ())
		2298	;
		2299
		2300	sv_setsv (sv_activity, &PL_sv_undef);
		2301	if (coro_nready >= incede)
		2302	{
		2303	PUSHMARK (SP);
		2304	PUTBACK;
		2305	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
		2306	SPAGAIN;
		2307	}
		2308
		2309	--incede;
		2310	}
		2311
		2312
		2313	MODULE = Coro::State PACKAGE = PerlIO::cede
		2314
		2315	BOOT:
		2316	PerlIO_define_layer (aTHX_ &PerlIO_cede);

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