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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.158 by root, Fri Sep 21 02:23:48 2007 UTC vs.
Revision 1.241 by root, Mon Jul 21 02:39:15 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"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#include <stdio.h>	12	#include <stdio.h>
12	#include <errno.h>	13	#include <errno.h>
13	#include <assert.h>	14	#include <assert.h>
		15
		16	#ifdef WIN32
		17	# undef setjmp
		18	# undef longjmp
		19	# undef _exit
		20	# define setjmp _setjmp // deep magic, don't ask
		21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
		23	#endif
14		24
15	#ifdef HAVE_MMAP	25	#ifdef HAVE_MMAP
16	# include <unistd.h>	26	# include <unistd.h>
17	# include <sys/mman.h>	27	# include <sys/mman.h>
18	# ifndef MAP_ANONYMOUS	28	# ifndef MAP_ANONYMOUS
…		…
70	# ifndef IS_PADCONST	80	# ifndef IS_PADCONST
71	# define IS_PADCONST(v) 0	81	# define IS_PADCONST(v) 0
72	# endif	82	# endif
73	#endif	83	#endif
74		84
		85	/* 5.8.8 */
		86	#ifndef GV_NOTQUAL
		87	# define GV_NOTQUAL 0
		88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
		91	#endif
		92
		93	/* 5.11 */
		94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
		97
75	/* 5.8.7 */	98	/* 5.8.7 */
76	#ifndef SvRV_set	99	#ifndef SvRV_set
77	# define SvRV_set(s,v) SvRV(s) = (v)	100	# define SvRV_set(s,v) SvRV(s) = (v)
78	#endif	101	#endif
79		102
…		…
98	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
99		122
100	#if __GNUC__ >= 3	123	#if __GNUC__ >= 3
101	# define attribute(x) __attribute__(x)	124	# define attribute(x) __attribute__(x)
102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
103	#else	127	#else
104	# define attribute(x)	128	# define attribute(x)
105	# define BARRIER	129	# define BARRIER
		130	# define expect(expr,value) (expr)
106	#endif	131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
107		135
108	#define NOINLINE attribute ((noinline))	136	#define NOINLINE attribute ((noinline))
109		137
110	#include "CoroAPI.h"	138	#include "CoroAPI.h"
111		139
…		…
130	static size_t coro_stacksize = CORO_STACKSIZE;	158	static size_t coro_stacksize = CORO_STACKSIZE;
131	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
132	static AV *main_mainstack; /* used to differentiate between $main and others */	160	static AV *main_mainstack; /* used to differentiate between $main and others */
133	static JMPENV *main_top_env;	161	static JMPENV *main_top_env;
134	static HV *coro_state_stash, *coro_stash;	162	static HV *coro_state_stash, *coro_stash;
135	static SV *coro_mortal; /* will be freed after next transfer */	163	static volatile SV *coro_mortal; /* will be freed after next transfer */
		164
		165	static GV *irsgv; /* $/ */
		166	static GV *stdoutgv; /* *STDOUT */
		167	static SV *rv_diehook;
		168	static SV *rv_warnhook;
		169	static HV *hv_sig; /* %SIG */
		170
		171	/* async_pool helper stuff */
		172	static SV *sv_pool_rss;
		173	static SV *sv_pool_size;
		174	static AV *av_async_pool;
		175
		176	/* Coro::AnyEvent */
		177	static SV *sv_activity;
136		178
137	static struct coro_cctx *cctx_first;	179	static struct coro_cctx *cctx_first;
138	static int cctx_count, cctx_idle;	180	static int cctx_count, cctx_idle;
		181
		182	enum {
		183	CC_MAPPED = 0x01,
		184	CC_NOREUSE = 0x02, /* throw this away after tracing */
		185	CC_TRACE = 0x04,
		186	CC_TRACE_SUB = 0x08, /* trace sub calls */
		187	CC_TRACE_LINE = 0x10, /* trace each statement */
		188	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		189	};
139		190
140	/* this is a structure representing a c-level coroutine */	191	/* this is a structure representing a c-level coroutine */
141	typedef struct coro_cctx {	192	typedef struct coro_cctx {
142	struct coro_cctx *next;	193	struct coro_cctx *next;
143		194
…		…
152	coro_context cctx;	203	coro_context cctx;
153		204
154	#if CORO_USE_VALGRIND	205	#if CORO_USE_VALGRIND
155	int valgrind_id;	206	int valgrind_id;
156	#endif	207	#endif
157	char inuse, mapped;	208	unsigned char flags;
158	} coro_cctx;	209	} coro_cctx;
159		210
160	enum {	211	enum {
161	CF_RUNNING = 0x0001, /* coroutine is running */	212	CF_RUNNING = 0x0001, /* coroutine is running */
162	CF_READY = 0x0002, /* coroutine is ready */	213	CF_READY = 0x0002, /* coroutine is ready */
163	CF_NEW = 0x0004, /* has never been switched to */	214	CF_NEW = 0x0004, /* has never been switched to */
164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	215	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
165	};	216	};
166		217
		218	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		219	typedef struct {
		220	SV *defsv;
		221	AV *defav;
		222	SV *errsv;
		223	SV *irsgv;
		224	#define VAR(name,type) type name;
		225	# include "state.h"
		226	#undef VAR
		227	} perl_slots;
		228
		229	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		230
167	/* this is a structure representing a perl-level coroutine */	231	/* this is a structure representing a perl-level coroutine */
168	struct coro {	232	struct coro {
169	/* the c coroutine allocated to this perl coroutine, if any */	233	/* the c coroutine allocated to this perl coroutine, if any */
170	coro_cctx *cctx;	234	coro_cctx *cctx;
171		235
		236	/* process data */
		237	AV *mainstack;
		238	perl_slots *slot; /* basically the saved sp */
		239
172	/* data associated with this coroutine (initial args) */	240	AV *args; /* data associated with this coroutine (initial args) */
173	AV *args;	241	int refcnt; /* coroutines are refcounted, yes */
174	int refcnt;
175	int save; /* CORO_SAVE flags */
176	int flags; /* CF_ flags */	242	int flags; /* CF_ flags */
		243	HV *hv; /* the perl hash associated with this coro, if any */
177		244
178	/* optionally saved, might be zero */	245	/* statistics */
179	AV *defav; /* @_ */	246	int usecount; /* number of transfers to this coro */
180	SV *defsv; /* $_ */
181	SV *errsv; /* $@ */
182	GV *deffh; /* default filehandle */
183	SV *irssv; /* $/ */
184	SV *irssv_sv; /* real $/ cache */
185
186	#define VAR(name,type) type name;
187	# include "state.h"
188	#undef VAR
189		247
190	/* coro process data */	248	/* coro process data */
191	int prio;	249	int prio;
		250	SV *throw; /* exception to be thrown */
		251
		252	/* async_pool */
		253	SV *saved_deffh;
192		254
193	/* linked list */	255	/* linked list */
194	struct coro *next, *prev;	256	struct coro *next, *prev;
195	HV *hv; /* the perl hash associated with this coro, if any */
196	};	257	};
197		258
198	typedef struct coro *Coro__State;	259	typedef struct coro *Coro__State;
199	typedef struct coro *Coro__State_or_hashref;	260	typedef struct coro *Coro__State_or_hashref;
200		261
…		…
207	#define PRIO_IDLE -3	268	#define PRIO_IDLE -3
208	#define PRIO_MIN -4	269	#define PRIO_MIN -4
209		270
210	/* for Coro.pm */	271	/* for Coro.pm */
211	static SV *coro_current;	272	static SV *coro_current;
		273	static SV *coro_readyhook;
212	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
213	static int coro_nready;	275	static int coro_nready;
214	static struct coro *coro_first;	276	static struct coro *coro_first;
215		277
216	/** lowlevel stuff **********************************************************/	278	/** lowlevel stuff **********************************************************/
217		279
		280	static SV *
		281	coro_get_sv (pTHX_ const char *name, int create)
		282	{
		283	#if PERL_VERSION_ATLEAST (5,10,0)
		284	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		285	get_sv (name, create);
		286	#endif
		287	return get_sv (name, create);
		288	}
		289
		290	static AV *
		291	coro_get_av (pTHX_ const char *name, int create)
		292	{
		293	#if PERL_VERSION_ATLEAST (5,10,0)
		294	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		295	get_av (name, create);
		296	#endif
		297	return get_av (name, create);
		298	}
		299
		300	static HV *
		301	coro_get_hv (pTHX_ const char *name, int create)
		302	{
		303	#if PERL_VERSION_ATLEAST (5,10,0)
		304	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		305	get_hv (name, create);
		306	#endif
		307	return get_hv (name, create);
		308	}
		309
218	static AV *	310	static AV *
219	coro_clone_padlist (pTHX_ CV *cv)	311	coro_clone_padlist (pTHX_ CV *cv)
220	{	312	{
221	AV *padlist = CvPADLIST (cv);	313	AV *padlist = CvPADLIST (cv);
222	AV *newpadlist, *newpad;	314	AV *newpadlist, *newpad;
223		315
224	newpadlist = newAV ();	316	newpadlist = newAV ();
225	AvREAL_off (newpadlist);	317	AvREAL_off (newpadlist);
226	#if PERL_VERSION_ATLEAST (5,9,0)	318	#if PERL_VERSION_ATLEAST (5,10,0)
227	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	319	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
228	#else	320	#else
229	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
230	#endif	322	#endif
231	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
269		361
270	/* casting is fun. */	362	/* casting is fun. */
271	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	363	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
272	free_padlist (aTHX_ padlist);	364	free_padlist (aTHX_ padlist);
273		365
274	SvREFCNT_dec (av);
275
276	return 0;	366	return 0;
277	}	367	}
278		368
279	#define PERL_MAGIC_coro PERL_MAGIC_ext	369	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		370	#define CORO_MAGIC_type_state PERL_MAGIC_ext
280		371
281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	372	static MGVTBL coro_cv_vtbl = {
		373	0, 0, 0, 0,
		374	coro_cv_free
		375	};
282		376
283	#define CORO_MAGIC(cv) \	377	#define CORO_MAGIC(sv,type) \
284	SvMAGIC (cv) \	378	SvMAGIC (sv) \
285	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	379	? SvMAGIC (sv)->mg_type == type \
286	? SvMAGIC (cv) \	380	? SvMAGIC (sv) \
287	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	381	: mg_find (sv, type) \
288	: 0	382	: 0
		383
		384	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		385	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		386
		387	static struct coro *
		388	SvSTATE_ (pTHX_ SV *coro)
		389	{
		390	HV *stash;
		391	MAGIC *mg;
		392
		393	if (SvROK (coro))
		394	coro = SvRV (coro);
		395
		396	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		397	croak ("Coro::State object required");
		398
		399	stash = SvSTASH (coro);
		400	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		401	{
		402	/* very slow, but rare, check */
		403	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		404	croak ("Coro::State object required");
		405	}
		406
		407	mg = CORO_MAGIC_state (coro);
		408	return (struct coro *)mg->mg_ptr;
		409	}
		410
		411	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
289		412
290	/* the next two functions merely cache the padlists */	413	/* the next two functions merely cache the padlists */
291	static void	414	static void
292	get_padlist (pTHX_ CV *cv)	415	get_padlist (pTHX_ CV *cv)
293	{	416	{
294	MAGIC *mg = CORO_MAGIC (cv);	417	MAGIC *mg = CORO_MAGIC_cv (cv);
295	AV *av;	418	AV *av;
296		419
297	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	420	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
298	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	421	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
299	else	422	else
300	{	423	{
301	#if CORO_PREFER_PERL_FUNCTIONS	424	#if CORO_PREFER_PERL_FUNCTIONS
302	/* this is probably cleaner, but also slower? */	425	/* this is probably cleaner, but also slower? */
…		…
311	}	434	}
312		435
313	static void	436	static void
314	put_padlist (pTHX_ CV *cv)	437	put_padlist (pTHX_ CV *cv)
315	{	438	{
316	MAGIC *mg = CORO_MAGIC (cv);	439	MAGIC *mg = CORO_MAGIC_cv (cv);
317	AV *av;	440	AV *av;
318		441
319	if (!mg)	442	if (expect_false (!mg))
320	{	443	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
321	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
322	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
323	mg->mg_virtual = &vtbl_coro;
324	mg->mg_obj = (SV *)newAV ();
325	}
326		444
327	av = (AV *)mg->mg_obj;	445	av = (AV *)mg->mg_obj;
328		446
329	if (AvFILLp (av) >= AvMAX (av))	447	if (expect_false (AvFILLp (av) >= AvMAX (av)))
330	av_extend (av, AvMAX (av) + 1);	448	av_extend (av, AvMAX (av) + 1);
331		449
332	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	450	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
333	}	451	}
334		452
335	/** load & save, init *******************************************************/	453	/** load & save, init *******************************************************/
336
337	#define SB do {
338	#define SE } while (0)
339
340	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
341		454
342	static void	455	static void
343	load_perl (pTHX_ Coro__State c)	456	load_perl (pTHX_ Coro__State c)
344	{	457	{
		458	perl_slots *slot = c->slot;
		459	c->slot = 0;
		460
		461	PL_mainstack = c->mainstack;
		462
		463	GvSV (PL_defgv) = slot->defsv;
		464	GvAV (PL_defgv) = slot->defav;
		465	GvSV (PL_errgv) = slot->errsv;
		466	GvSV (irsgv) = slot->irsgv;
		467
345	#define VAR(name,type) PL_ ## name = c->name;	468	#define VAR(name,type) PL_ ## name = slot->name;
346	# include "state.h"	469	# include "state.h"
347	#undef VAR	470	#undef VAR
348
349	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
350	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
351	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
352	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
353
354	if (c->irssv)
355	{
356	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
357	{
358	SvREFCNT_dec (c->irssv);
359	c->irssv = 0;
360	}
361	else
362	{
363	REPLACE_SV (PL_rs, c->irssv);
364	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
365	sv_setsv (c->irssv_sv, PL_rs);
366	}
367	}
368		471
369	{	472	{
370	dSP;	473	dSP;
		474
371	CV *cv;	475	CV *cv;
372		476
373	/* now do the ugly restore mess */	477	/* now do the ugly restore mess */
374	while ((cv = (CV *)POPs))	478	while (expect_true (cv = (CV *)POPs))
375	{	479	{
376	put_padlist (aTHX_ cv); /* mark this padlist as available */	480	put_padlist (aTHX_ cv); /* mark this padlist as available */
377	CvDEPTH (cv) = PTR2IV (POPs);	481	CvDEPTH (cv) = PTR2IV (POPs);
378	CvPADLIST (cv) = (AV *)POPs;	482	CvPADLIST (cv) = (AV *)POPs;
379	}	483	}
…		…
398		502
399	XPUSHs (Nullsv);	503	XPUSHs (Nullsv);
400	/* this loop was inspired by pp_caller */	504	/* this loop was inspired by pp_caller */
401	for (;;)	505	for (;;)
402	{	506	{
403	while (cxix >= 0)	507	while (expect_true (cxix >= 0))
404	{	508	{
405	PERL_CONTEXT *cx = &ccstk[cxix--];	509	PERL_CONTEXT *cx = &ccstk[cxix--];
406		510
407	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)	511	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
408	{	512	{
409	CV *cv = cx->blk_sub.cv;	513	CV *cv = cx->blk_sub.cv;
410		514
411	if (CvDEPTH (cv))	515	if (expect_true (CvDEPTH (cv)))
412	{	516	{
413	EXTEND (SP, 3);	517	EXTEND (SP, 3);
414	PUSHs ((SV *)CvPADLIST (cv));	518	PUSHs ((SV *)CvPADLIST (cv));
415	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	519	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
416	PUSHs ((SV *)cv);	520	PUSHs ((SV *)cv);
417		521
418	CvDEPTH (cv) = 0;	522	CvDEPTH (cv) = 0;
419	get_padlist (aTHX_ cv);	523	get_padlist (aTHX_ cv);
420	}	524	}
421	}	525	}
422	}	526	}
423		527
424	if (top_si->si_type == PERLSI_MAIN)	528	if (expect_true (top_si->si_type == PERLSI_MAIN))
425	break;	529	break;
426		530
427	top_si = top_si->si_prev;	531	top_si = top_si->si_prev;
428	ccstk = top_si->si_cxstack;	532	ccstk = top_si->si_cxstack;
429	cxix = top_si->si_cxix;	533	cxix = top_si->si_cxix;
430	}	534	}
431		535
432	PUTBACK;	536	PUTBACK;
433	}	537	}
434		538
435	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	539	/* allocate some space on the context stack for our purposes */
436	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	540	/* we manually unroll here, as usually 2 slots is enough */
437	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	541	if (SLOT_COUNT >= 1) CXINC;
438	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;	542	if (SLOT_COUNT >= 2) CXINC;
439	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	543	if (SLOT_COUNT >= 3) CXINC;
		544	{
		545	int i;
		546	for (i = 3; i < SLOT_COUNT; ++i)
		547	CXINC;
		548	}
		549	cxstack_ix -= SLOT_COUNT; /* undo allocation */
440		550
		551	c->mainstack = PL_mainstack;
		552
		553	{
		554	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		555
		556	slot->defav = GvAV (PL_defgv);
		557	slot->defsv = DEFSV;
		558	slot->errsv = ERRSV;
		559	slot->irsgv = GvSV (irsgv);
		560
441	#define VAR(name,type)c->name = PL_ ## name;	561	#define VAR(name,type) slot->name = PL_ ## name;
442	# include "state.h"	562	# include "state.h"
443	#undef VAR	563	#undef VAR
		564	}
444	}	565	}
445		566
446	/*	567	/*
447	* allocate various perl stacks. This is an exact copy	568	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	569	* of perl.c:init_stacks, except that it uses less memory
…		…
453	# define coro_init_stacks init_stacks	574	# define coro_init_stacks init_stacks
454	#else	575	#else
455	static void	576	static void
456	coro_init_stacks (pTHX)	577	coro_init_stacks (pTHX)
457	{	578	{
458	PL_curstackinfo = new_stackinfo(64, 6);	579	PL_curstackinfo = new_stackinfo(32, 8);
459	PL_curstackinfo->si_type = PERLSI_MAIN;	580	PL_curstackinfo->si_type = PERLSI_MAIN;
460	PL_curstack = PL_curstackinfo->si_stack;	581	PL_curstack = PL_curstackinfo->si_stack;
461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	582	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462		583
463	PL_stack_base = AvARRAY(PL_curstack);	584	PL_stack_base = AvARRAY(PL_curstack);
464	PL_stack_sp = PL_stack_base;	585	PL_stack_sp = PL_stack_base;
465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	586	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466		587
467	New(50,PL_tmps_stack,64,SV*);	588	New(50,PL_tmps_stack,32,SV*);
468	PL_tmps_floor = -1;	589	PL_tmps_floor = -1;
469	PL_tmps_ix = -1;	590	PL_tmps_ix = -1;
470	PL_tmps_max = 64;	591	PL_tmps_max = 32;
471		592
472	New(54,PL_markstack,16,I32);	593	New(54,PL_markstack,16,I32);
473	PL_markstack_ptr = PL_markstack;	594	PL_markstack_ptr = PL_markstack;
474	PL_markstack_max = PL_markstack + 16;	595	PL_markstack_max = PL_markstack + 16;
475		596
476	#ifdef SET_MARK_OFFSET	597	#ifdef SET_MARK_OFFSET
477	SET_MARK_OFFSET;	598	SET_MARK_OFFSET;
478	#endif	599	#endif
479		600
480	New(54,PL_scopestack,16,I32);	601	New(54,PL_scopestack,8,I32);
481	PL_scopestack_ix = 0;	602	PL_scopestack_ix = 0;
482	PL_scopestack_max = 16;	603	PL_scopestack_max = 8;
483		604
484	New(54,PL_savestack,64,ANY);	605	New(54,PL_savestack,24,ANY);
485	PL_savestack_ix = 0;	606	PL_savestack_ix = 0;
486	PL_savestack_max = 64;	607	PL_savestack_max = 24;
487		608
488	#if !PERL_VERSION_ATLEAST (5,9,0)	609	#if !PERL_VERSION_ATLEAST (5,10,0)
489	New(54,PL_retstack,4,OP*);	610	New(54,PL_retstack,4,OP*);
490	PL_retstack_ix = 0;	611	PL_retstack_ix = 0;
491	PL_retstack_max = 4;	612	PL_retstack_max = 4;
492	#endif	613	#endif
493	}	614	}
…		…
497	* destroy the stacks, the callchain etc...	618	* destroy the stacks, the callchain etc...
498	*/	619	*/
499	static void	620	static void
500	coro_destroy_stacks (pTHX)	621	coro_destroy_stacks (pTHX)
501	{	622	{
502	if (!IN_DESTRUCT)
503	{
504	/* restore all saved variables and stuff */
505	LEAVE_SCOPE (0);
506	assert (PL_tmps_floor == -1);
507
508	/* free all temporaries */
509	FREETMPS;
510	assert (PL_tmps_ix == -1);
511
512	/* unwind all extra stacks */
513	POPSTACK_TO (PL_mainstack);
514
515	/* unwind main stack */
516	dounwind (-1);
517	}
518
519	while (PL_curstackinfo->si_next)	623	while (PL_curstackinfo->si_next)
520	PL_curstackinfo = PL_curstackinfo->si_next;	624	PL_curstackinfo = PL_curstackinfo->si_next;
521		625
522	while (PL_curstackinfo)	626	while (PL_curstackinfo)
523	{	627	{
…		…
533		637
534	Safefree (PL_tmps_stack);	638	Safefree (PL_tmps_stack);
535	Safefree (PL_markstack);	639	Safefree (PL_markstack);
536	Safefree (PL_scopestack);	640	Safefree (PL_scopestack);
537	Safefree (PL_savestack);	641	Safefree (PL_savestack);
538	#if !PERL_VERSION_ATLEAST (5,9,0)	642	#if !PERL_VERSION_ATLEAST (5,10,0)
539	Safefree (PL_retstack);	643	Safefree (PL_retstack);
540	#endif	644	#endif
541	}	645	}
542		646
543	static size_t	647	static size_t
544	coro_rss (struct coro *coro)	648	coro_rss (pTHX_ struct coro *coro)
545	{	649	{
546	size_t rss = sizeof (coro);	650	size_t rss = sizeof (*coro);
547		651
548	if (coro->mainstack)	652	if (coro->mainstack)
549	{	653	{
		654	perl_slots tmp_slot;
		655	perl_slots *slot;
		656
550	if (coro->flags & CF_RUNNING)	657	if (coro->flags & CF_RUNNING)
551	{	658	{
		659	slot = &tmp_slot;
		660
552	#define VAR(name,type)coro->name = PL_ ## name;	661	#define VAR(name,type) slot->name = PL_ ## name;
553	# include "state.h"	662	# include "state.h"
554	#undef VAR	663	#undef VAR
555	}	664	}
		665	else
		666	slot = coro->slot;
556		667
557	rss += sizeof (coro->curstackinfo);	668	rss += sizeof (slot->curstackinfo);
558	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
559	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);	669	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
560	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);	670	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
561	rss += coro->tmps_max * sizeof (SV *);	671	rss += slot->tmps_max * sizeof (SV *);
562	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);	672	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
563	rss += coro->scopestack_max * sizeof (I32);	673	rss += slot->scopestack_max * sizeof (I32);
564	rss += coro->savestack_max * sizeof (ANY);	674	rss += slot->savestack_max * sizeof (ANY);
565		675
566	#if !PERL_VERSION_ATLEAST (5,9,0)	676	#if !PERL_VERSION_ATLEAST (5,10,0)
567	rss += coro->retstack_max * sizeof (OP *);	677	rss += slot->retstack_max * sizeof (OP *);
568	#endif	678	#endif
569	}	679	}
570		680
571	return rss;	681	return rss;
572	}	682	}
573		683
574	/** coroutine stack handling ************************************************/	684	/** coroutine stack handling ************************************************/
575		685
		686	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		687	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		688	static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
		689
		690	/* apparently < 5.8.8 */
		691	#ifndef MgPV_nolen_const
		692	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		693	SvPV_nolen((SV*)((mg)->mg_ptr)) : \
		694	(const char*)(mg)->mg_ptr)
		695	#endif
		696
		697	/*
		698	* This overrides the default magic get method of %SIG elements.
		699	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		700	* and instead of tryign to save and restore the hash elements, we just provide
		701	* readback here.
		702	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		703	* not expecting this to actually change the hook. This is a potential problem
		704	* when a schedule happens then, but we ignore this.
		705	*/
		706	static int
		707	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		708	{
		709	const char *s = MgPV_nolen_const (mg);
		710
		711	if (*s == '_')
		712	{
		713	SV **svp = 0;
		714
		715	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		716	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		717
		718	if (svp)
		719	{
		720	sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
		721	return 0;
		722	}
		723	}
		724
		725	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		726	}
		727
		728	static int
		729	coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
		730	{
		731	const char *s = MgPV_nolen_const (mg);
		732
		733	if (*s == '_')
		734	{
		735	SV **svp = 0;
		736
		737	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		738	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		739
		740	if (svp)
		741	{
		742	SV *old = *svp;
		743	*svp = 0;
		744	SvREFCNT_dec (old);
		745	return 0;
		746	}
		747	}
		748
		749	return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
		750	}
		751
		752	static int
		753	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		754	{
		755	const char *s = MgPV_nolen_const (mg);
		756
		757	if (*s == '_')
		758	{
		759	SV **svp = 0;
		760
		761	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		762	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		763
		764	if (svp)
		765	{
		766	SV *old = *svp;
		767	*svp = newSVsv (sv);
		768	SvREFCNT_dec (old);
		769	return 0;
		770	}
		771	}
		772
		773	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		774	}
		775
576	static void	776	static void
577	setup_coro (pTHX_ struct coro *coro)	777	coro_setup (pTHX_ struct coro *coro)
578	{	778	{
579	/*	779	/*
580	* emulate part of the perl startup here.	780	* emulate part of the perl startup here.
581	*/	781	*/
582	coro_init_stacks (aTHX);	782	coro_init_stacks (aTHX);
583		783
		784	PL_runops = RUNOPS_DEFAULT;
584	PL_curcop = &PL_compiling;	785	PL_curcop = &PL_compiling;
585	PL_in_eval = EVAL_NULL;	786	PL_in_eval = EVAL_NULL;
586	PL_comppad = 0;	787	PL_comppad = 0;
587	PL_curpm = 0;	788	PL_curpm = 0;
		789	PL_curpad = 0;
588	PL_localizing = 0;	790	PL_localizing = 0;
589	PL_dirty = 0;	791	PL_dirty = 0;
590	PL_restartop = 0;	792	PL_restartop = 0;
		793	#if PERL_VERSION_ATLEAST (5,10,0)
		794	PL_parser = 0;
		795	#endif
		796
		797	/* recreate the die/warn hooks */
		798	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		799	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		800
		801	GvSV (PL_defgv) = newSV (0);
		802	GvAV (PL_defgv) = coro->args; coro->args = 0;
		803	GvSV (PL_errgv) = newSV (0);
		804	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		805	PL_rs = newSVsv (GvSV (irsgv));
		806	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
591		807
592	{	808	{
593	dSP;	809	dSP;
594	LOGOP myop;	810	LOGOP myop;
595		811
596	SvREFCNT_dec (GvAV (PL_defgv));
597	GvAV (PL_defgv) = coro->args; coro->args = 0;
598
599	Zero (&myop, 1, LOGOP);	812	Zero (&myop, 1, LOGOP);
600	myop.op_next = Nullop;	813	myop.op_next = Nullop;
601	myop.op_flags = OPf_WANT_VOID;	814	myop.op_flags = OPf_WANT_VOID;
602		815
603	PUSHMARK (SP);	816	PUSHMARK (SP);
604	XPUSHs (av_shift (GvAV (PL_defgv)));	817	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
605	PUTBACK;	818	PUTBACK;
606	PL_op = (OP *)&myop;	819	PL_op = (OP *)&myop;
607	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
608	SPAGAIN;	821	SPAGAIN;
609	}	822	}
610		823
611	ENTER; /* necessary e.g. for dounwind */	824	/* this newly created coroutine might be run on an existing cctx which most
		825	* likely was suspended in set_stacklevel, called from entersub.
		826	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		827	* so we ENTER here for symmetry
		828	*/
		829	ENTER;
		830	}
		831
		832	static void
		833	coro_destroy (pTHX_ struct coro *coro)
		834	{
		835	if (!IN_DESTRUCT)
		836	{
		837	/* restore all saved variables and stuff */
		838	LEAVE_SCOPE (0);
		839	assert (PL_tmps_floor == -1);
		840
		841	/* free all temporaries */
		842	FREETMPS;
		843	assert (PL_tmps_ix == -1);
		844
		845	/* unwind all extra stacks */
		846	POPSTACK_TO (PL_mainstack);
		847
		848	/* unwind main stack */
		849	dounwind (-1);
		850	}
		851
		852	SvREFCNT_dec (GvSV (PL_defgv));
		853	SvREFCNT_dec (GvAV (PL_defgv));
		854	SvREFCNT_dec (GvSV (PL_errgv));
		855	SvREFCNT_dec (PL_defoutgv);
		856	SvREFCNT_dec (PL_rs);
		857	SvREFCNT_dec (GvSV (irsgv));
		858
		859	SvREFCNT_dec (PL_diehook);
		860	SvREFCNT_dec (PL_warnhook);
		861
		862	SvREFCNT_dec (coro->saved_deffh);
		863	SvREFCNT_dec (coro->throw);
		864
		865	coro_destroy_stacks (aTHX);
612	}	866	}
613		867
614	static void	868	static void
615	free_coro_mortal (pTHX)	869	free_coro_mortal (pTHX)
616	{	870	{
617	if (coro_mortal)	871	if (expect_true (coro_mortal))
618	{	872	{
619	SvREFCNT_dec (coro_mortal);	873	SvREFCNT_dec (coro_mortal);
620	coro_mortal = 0;	874	coro_mortal = 0;
621	}	875	}
		876	}
		877
		878	static int
		879	runops_trace (pTHX)
		880	{
		881	COP *oldcop = 0;
		882	int oldcxix = -2;
		883	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		884	coro_cctx *cctx = coro->cctx;
		885
		886	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		887	{
		888	PERL_ASYNC_CHECK ();
		889
		890	if (cctx->flags & CC_TRACE_ALL)
		891	{
		892	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		893	{
		894	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		895	SV **bot, **top;
		896	AV *av = newAV (); /* return values */
		897	SV **cb;
		898	dSP;
		899
		900	GV *gv = CvGV (cx->blk_sub.cv);
		901	SV *fullname = sv_2mortal (newSV (0));
		902	if (isGV (gv))
		903	gv_efullname3 (fullname, gv, 0);
		904
		905	bot = PL_stack_base + cx->blk_oldsp + 1;
		906	top = cx->blk_gimme == G_ARRAY ? SP + 1
		907	: cx->blk_gimme == G_SCALAR ? bot + 1
		908	: bot;
		909
		910	av_extend (av, top - bot);
		911	while (bot < top)
		912	av_push (av, SvREFCNT_inc (*bot++));
		913
		914	PL_runops = RUNOPS_DEFAULT;
		915	ENTER;
		916	SAVETMPS;
		917	EXTEND (SP, 3);
		918	PUSHMARK (SP);
		919	PUSHs (&PL_sv_no);
		920	PUSHs (fullname);
		921	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		922	PUTBACK;
		923	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		924	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		925	SPAGAIN;
		926	FREETMPS;
		927	LEAVE;
		928	PL_runops = runops_trace;
		929	}
		930
		931	if (oldcop != PL_curcop)
		932	{
		933	oldcop = PL_curcop;
		934
		935	if (PL_curcop != &PL_compiling)
		936	{
		937	SV **cb;
		938
		939	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		940	{
		941	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		942
		943	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		944	{
		945	runops_proc_t old_runops = PL_runops;
		946	dSP;
		947	GV *gv = CvGV (cx->blk_sub.cv);
		948	SV *fullname = sv_2mortal (newSV (0));
		949
		950	if (isGV (gv))
		951	gv_efullname3 (fullname, gv, 0);
		952
		953	PL_runops = RUNOPS_DEFAULT;
		954	ENTER;
		955	SAVETMPS;
		956	EXTEND (SP, 3);
		957	PUSHMARK (SP);
		958	PUSHs (&PL_sv_yes);
		959	PUSHs (fullname);
		960	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		961	PUTBACK;
		962	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		963	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		964	SPAGAIN;
		965	FREETMPS;
		966	LEAVE;
		967	PL_runops = runops_trace;
		968	}
		969
		970	oldcxix = cxstack_ix;
		971	}
		972
		973	if (cctx->flags & CC_TRACE_LINE)
		974	{
		975	dSP;
		976
		977	PL_runops = RUNOPS_DEFAULT;
		978	ENTER;
		979	SAVETMPS;
		980	EXTEND (SP, 3);
		981	PL_runops = RUNOPS_DEFAULT;
		982	PUSHMARK (SP);
		983	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		984	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		985	PUTBACK;
		986	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		987	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		988	SPAGAIN;
		989	FREETMPS;
		990	LEAVE;
		991	PL_runops = runops_trace;
		992	}
		993	}
		994	}
		995	}
		996	}
		997
		998	TAINT_NOT;
		999	return 0;
622	}	1000	}
623		1001
624	/* inject a fake call to Coro::State::_cctx_init into the execution */	1002	/* inject a fake call to Coro::State::_cctx_init into the execution */
625	/* _cctx_init should be careful, as it could be called at almost any time */	1003	/* _cctx_init should be careful, as it could be called at almost any time */
626	/* during execution of a perl program */	1004	/* during execution of a perl program */
627	static void NOINLINE	1005	static void NOINLINE
628	prepare_cctx (pTHX_ coro_cctx *cctx)	1006	cctx_prepare (pTHX_ coro_cctx *cctx)
629	{	1007	{
630	dSP;	1008	dSP;
631	LOGOP myop;	1009	LOGOP myop;
		1010
		1011	PL_top_env = &PL_start_env;
		1012
		1013	if (cctx->flags & CC_TRACE)
		1014	PL_runops = runops_trace;
632		1015
633	Zero (&myop, 1, LOGOP);	1016	Zero (&myop, 1, LOGOP);
634	myop.op_next = PL_op;	1017	myop.op_next = PL_op;
635	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1018	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
636		1019
…		…
646		1029
647	/*	1030	/*
648	* this is a _very_ stripped down perl interpreter ;)	1031	* this is a _very_ stripped down perl interpreter ;)
649	*/	1032	*/
650	static void	1033	static void
651	coro_run (void *arg)	1034	cctx_run (void *arg)
652	{	1035	{
653	dTHX;	1036	dTHX;
654		1037
655	/* coro_run is the alternative tail of transfer(), so unlock here. */	1038	/* cctx_run is the alternative tail of transfer(), so unlock here. */
656	UNLOCK;	1039	UNLOCK;
657		1040
658	PL_top_env = &PL_start_env;	1041	/* we now skip the entersub that lead to transfer() */
		1042	PL_op = PL_op->op_next;
659		1043
660	/* inject a fake subroutine call to cctx_init */	1044	/* inject a fake subroutine call to cctx_init */
661	prepare_cctx (aTHX_ (coro_cctx *)arg);	1045	cctx_prepare (aTHX_ (coro_cctx *)arg);
662		1046
663	/* somebody or something will hit me for both perl_run and PL_restartop */	1047	/* somebody or something will hit me for both perl_run and PL_restartop */
664	PL_restartop = PL_op;	1048	PL_restartop = PL_op;
665	perl_run (PL_curinterp);	1049	perl_run (PL_curinterp);
666		1050
…		…
685	++cctx_count;	1069	++cctx_count;
686		1070
687	Newz (0, cctx, 1, coro_cctx);	1071	Newz (0, cctx, 1, coro_cctx);
688		1072
689	#if HAVE_MMAP	1073	#if HAVE_MMAP
690
691	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1074	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
692	/* mmap supposedly does allocate-on-write for us */	1075	/* mmap supposedly does allocate-on-write for us */
693	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1076	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
694		1077
695	if (cctx->sptr != (void *)-1)	1078	if (cctx->sptr != (void *)-1)
…		…
697	# if CORO_STACKGUARD	1080	# if CORO_STACKGUARD
698	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1081	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
699	# endif	1082	# endif
700	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1083	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
701	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1084	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
702	cctx->mapped = 1;	1085	cctx->flags |= CC_MAPPED;
703	}	1086	}
704	else	1087	else
705	#endif	1088	#endif
706	{	1089	{
707	cctx->ssize = coro_stacksize * (long)sizeof (long);	1090	cctx->ssize = coro_stacksize * (long)sizeof (long);
…		…
716	stack_start = cctx->sptr;	1099	stack_start = cctx->sptr;
717	stack_size = cctx->ssize;	1100	stack_size = cctx->ssize;
718	}	1101	}
719		1102
720	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1103	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
721	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);	1104	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
722		1105
723	return cctx;	1106	return cctx;
724	}	1107	}
725		1108
726	static void	1109	static void
…		…
734	#if CORO_USE_VALGRIND	1117	#if CORO_USE_VALGRIND
735	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1118	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
736	#endif	1119	#endif
737		1120
738	#if HAVE_MMAP	1121	#if HAVE_MMAP
739	if (cctx->mapped)	1122	if (cctx->flags & CC_MAPPED)
740	munmap (cctx->sptr, cctx->ssize);	1123	munmap (cctx->sptr, cctx->ssize);
741	else	1124	else
742	#endif	1125	#endif
743	Safefree (cctx->sptr);	1126	Safefree (cctx->sptr);
744		1127
745	Safefree (cctx);	1128	Safefree (cctx);
746	}	1129	}
747		1130
		1131	/* wether this cctx should be destructed */
		1132	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1133
748	static coro_cctx *	1134	static coro_cctx *
749	cctx_get (pTHX)	1135	cctx_get (pTHX)
750	{	1136	{
751	while (cctx_first)	1137	while (expect_true (cctx_first))
752	{	1138	{
753	coro_cctx *cctx = cctx_first;	1139	coro_cctx *cctx = cctx_first;
754	cctx_first = cctx->next;	1140	cctx_first = cctx->next;
755	--cctx_idle;	1141	--cctx_idle;
756		1142
757	if (cctx->ssize >= coro_stacksize)	1143	if (expect_true (!CCTX_EXPIRED (cctx)))
758	return cctx;	1144	return cctx;
759		1145
760	cctx_destroy (cctx);	1146	cctx_destroy (cctx);
761	}	1147	}
762		1148
763	PL_op = PL_op->op_next;
764	return cctx_new ();	1149	return cctx_new ();
765	}	1150	}
766		1151
767	static void	1152	static void
768	cctx_put (coro_cctx *cctx)	1153	cctx_put (coro_cctx *cctx)
769	{	1154	{
770	/* free another cctx if overlimit */	1155	/* free another cctx if overlimit */
771	if (cctx_idle >= MAX_IDLE_CCTX)	1156	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
772	{	1157	{
773	coro_cctx *first = cctx_first;	1158	coro_cctx *first = cctx_first;
774	cctx_first = first->next;	1159	cctx_first = first->next;
775	--cctx_idle;	1160	--cctx_idle;
776		1161
777	assert (!first->inuse);
778	cctx_destroy (first);	1162	cctx_destroy (first);
779	}	1163	}
780		1164
781	++cctx_idle;	1165	++cctx_idle;
782	cctx->next = cctx_first;	1166	cctx->next = cctx_first;
783	cctx_first = cctx;	1167	cctx_first = cctx;
784	}	1168	}
785		1169
786	/** coroutine switching *****************************************************/	1170	/** coroutine switching *****************************************************/
787		1171
788	/* never call directly, always through the coro_state_transfer global variable */	1172	static void
		1173	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1174	{
		1175	if (expect_true (prev != next))
		1176	{
		1177	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1178	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1179
		1180	if (expect_false (next->flags & CF_RUNNING))
		1181	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1182
		1183	if (expect_false (next->flags & CF_DESTROYED))
		1184	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1185
		1186	#if !PERL_VERSION_ATLEAST (5,10,0)
		1187	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1188	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1189	#endif
		1190	}
		1191	}
		1192
		1193	/* always use the TRANSFER macro */
789	static void NOINLINE	1194	static void NOINLINE
790	transfer (pTHX_ struct coro *prev, struct coro *next)	1195	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
791	{	1196	{
792	dSTACKLEVEL;	1197	dSTACKLEVEL;
		1198	static volatile int has_throw;
793		1199
794	/* sometimes transfer is only called to set idle_sp */	1200	/* sometimes transfer is only called to set idle_sp */
795	if (!next)	1201	if (expect_false (!next))
796	{	1202	{
797	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1203	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
798	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1204	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
799	}	1205	}
800	else if (prev != next)	1206	else if (expect_true (prev != next))
801	{	1207	{
802	coro_cctx *prev__cctx;	1208	coro_cctx *prev__cctx;
803		1209
804	if (prev->flags & CF_NEW)	1210	if (expect_false (prev->flags & CF_NEW))
805	{	1211	{
806	/* create a new empty context */	1212	/* create a new empty context */
807	Newz (0, prev->cctx, 1, coro_cctx);	1213	Newz (0, prev->cctx, 1, coro_cctx);
808	prev->cctx->inuse = 1;
809	prev->flags &= ~CF_NEW;	1214	prev->flags &= ~CF_NEW;
810	prev->flags |= CF_RUNNING;	1215	prev->flags |= CF_RUNNING;
811	}	1216	}
812		1217
813	/*TODO: must not croak here */
814	if (!prev->flags & CF_RUNNING)
815	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
816
817	if (next->flags & CF_RUNNING)
818	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
819
820	if (next->flags & CF_DESTROYED)
821	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
822
823	prev->flags &= ~CF_RUNNING;	1218	prev->flags &= ~CF_RUNNING;
824	next->flags |= CF_RUNNING;	1219	next->flags |= CF_RUNNING;
825		1220
826	LOCK;	1221	LOCK;
827		1222
		1223	/* first get rid of the old state */
		1224	save_perl (aTHX_ prev);
		1225
828	if (next->flags & CF_NEW)	1226	if (expect_false (next->flags & CF_NEW))
829	{	1227	{
830	/* need to start coroutine */	1228	/* need to start coroutine */
831	next->flags &= ~CF_NEW;	1229	next->flags &= ~CF_NEW;
832	/* first get rid of the old state */
833	save_perl (aTHX_ prev);
834	/* setup coroutine call */	1230	/* setup coroutine call */
835	setup_coro (aTHX_ next);	1231	coro_setup (aTHX_ next);
836	/* need a new stack */
837	assert (!next->cctx);
838	}	1232	}
839	else	1233	else
840	{
841	/* coroutine already started */
842	save_perl (aTHX_ prev);
843	load_perl (aTHX_ next);	1234	load_perl (aTHX_ next);
844	}
845		1235
846	prev__cctx = prev->cctx;	1236	prev__cctx = prev->cctx;
847		1237
848	/* possibly "free" the cctx */	1238	/* possibly "free" the cctx */
		1239	if (expect_true (
849	if (prev__cctx->idle_sp == STACKLEVEL)	1240	prev__cctx->idle_sp == STACKLEVEL
		1241	&& !(prev__cctx->flags & CC_TRACE)
		1242	&& !force_cctx
		1243	))
850	{	1244	{
851	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1245	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
852	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1246	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
853		1247
854	prev->cctx = 0;	1248	prev->cctx = 0;
855		1249
		1250	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1251	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1252	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1253	if (!next->cctx)
		1254	next->cctx = cctx_get (aTHX);
		1255
856	cctx_put (prev__cctx);	1256	cctx_put (prev__cctx);
857	prev__cctx->inuse = 0;
858	}	1257	}
859		1258
		1259	++next->usecount;
		1260
860	if (!next->cctx)	1261	if (expect_true (!next->cctx))
861	{
862	next->cctx = cctx_get (aTHX);	1262	next->cctx = cctx_get (aTHX);
863	assert (!next->cctx->inuse);
864	next->cctx->inuse = 1;
865	}
866		1263
		1264	has_throw = !!next->throw;
		1265
867	if (prev__cctx != next->cctx)	1266	if (expect_false (prev__cctx != next->cctx))
868	{	1267	{
869	prev__cctx->top_env = PL_top_env;	1268	prev__cctx->top_env = PL_top_env;
870	PL_top_env = next->cctx->top_env;	1269	PL_top_env = next->cctx->top_env;
871	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1270	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
872	}	1271	}
873		1272
874	free_coro_mortal (aTHX);	1273	free_coro_mortal (aTHX);
875	UNLOCK;	1274	UNLOCK;
		1275
		1276	if (expect_false (has_throw))
		1277	{
		1278	struct coro *coro = SvSTATE (coro_current);
		1279
		1280	if (coro->throw)
		1281	{
		1282	SV *exception = coro->throw;
		1283	coro->throw = 0;
		1284	sv_setsv (ERRSV, exception);
		1285	croak (0);
		1286	}
		1287	}
876	}	1288	}
877	}	1289	}
878		1290
879	struct transfer_args	1291	struct transfer_args
880	{	1292	{
881	struct coro *prev, *next;	1293	struct coro *prev, *next;
882	};	1294	};
883		1295
		1296	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
884	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)	1297	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
885		1298
886	/** high level stuff ********************************************************/	1299	/** high level stuff ********************************************************/
887		1300
888	static int	1301	static int
889	coro_state_destroy (pTHX_ struct coro *coro)	1302	coro_state_destroy (pTHX_ struct coro *coro)
…		…
906		1319
907	if (coro->mainstack && coro->mainstack != main_mainstack)	1320	if (coro->mainstack && coro->mainstack != main_mainstack)
908	{	1321	{
909	struct coro temp;	1322	struct coro temp;
910		1323
911	assert (!(coro->flags & CF_RUNNING));
912
913	Zero (&temp, 1, struct coro);
914	temp.save = CORO_SAVE_ALL;
915
916	if (coro->flags & CF_RUNNING)	1324	if (coro->flags & CF_RUNNING)
917	croak ("FATAL: tried to destroy currently running coroutine");	1325	croak ("FATAL: tried to destroy currently running coroutine");
918		1326
919	save_perl (aTHX_ &temp);	1327	save_perl (aTHX_ &temp);
920	load_perl (aTHX_ coro);	1328	load_perl (aTHX_ coro);
921		1329
922	coro_destroy_stacks (aTHX);	1330	coro_destroy (aTHX_ coro);
923		1331
924	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */	1332	load_perl (aTHX_ &temp);
925		1333
926	coro->mainstack = 0;	1334	coro->slot = 0;
927	}	1335	}
928		1336
929	cctx_destroy (coro->cctx);	1337	cctx_destroy (coro->cctx);
930	SvREFCNT_dec (coro->args);	1338	SvREFCNT_dec (coro->args);
931		1339
…		…
972	#else	1380	#else
973	# define MGf_DUP 0	1381	# define MGf_DUP 0
974	#endif	1382	#endif
975	};	1383	};
976		1384
977	static struct coro *
978	SvSTATE_ (pTHX_ SV *coro)
979	{
980	HV *stash;
981	MAGIC *mg;
982
983	if (SvROK (coro))
984	coro = SvRV (coro);
985
986	stash = SvSTASH (coro);
987	if (stash != coro_stash && stash != coro_state_stash)
988	{
989	/* very slow, but rare, check */
990	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
991	croak ("Coro::State object required");
992	}
993
994	mg = CORO_MAGIC (coro);
995	return (struct coro *)mg->mg_ptr;
996	}
997
998	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
999
1000	static void	1385	static void
1001	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1386	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1002	{	1387	{
1003	ta->prev = SvSTATE (prev_sv);	1388	ta->prev = SvSTATE (prev_sv);
1004	ta->next = SvSTATE (next_sv);	1389	ta->next = SvSTATE (next_sv);
		1390	TRANSFER_CHECK (*ta);
1005	}	1391	}
1006		1392
1007	static void	1393	static void
1008	api_transfer (SV *prev_sv, SV *next_sv)	1394	api_transfer (SV *prev_sv, SV *next_sv)
1009	{	1395	{
1010	dTHX;	1396	dTHX;
1011	struct transfer_args ta;	1397	struct transfer_args ta;
1012		1398
1013	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1399	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1014	TRANSFER (ta);	1400	TRANSFER (ta, 1);
1015	}
1016
1017	static int
1018	api_save (SV *coro_sv, int new_save)
1019	{
1020	dTHX;
1021	struct coro *coro = SvSTATE (coro_sv);
1022	int old_save = coro->save;
1023
1024	if (new_save >= 0)
1025	coro->save = new_save;
1026
1027	return old_save;
1028	}	1401	}
1029		1402
1030	/** Coro ********************************************************************/	1403	/** Coro ********************************************************************/
1031		1404
1032	static void	1405	static void
…		…
1034	{	1407	{
1035	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1408	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1036	}	1409	}
1037		1410
1038	static SV *	1411	static SV *
1039	coro_deq (pTHX_ int min_prio)	1412	coro_deq (pTHX)
1040	{	1413	{
1041	int prio = PRIO_MAX - PRIO_MIN;	1414	int prio;
1042		1415
1043	min_prio -= PRIO_MIN;
1044	if (min_prio < 0)
1045	min_prio = 0;
1046
1047	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1416	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1048	if (AvFILLp (coro_ready [prio]) >= 0)	1417	if (AvFILLp (coro_ready [prio]) >= 0)
1049	return av_shift (coro_ready [prio]);	1418	return av_shift (coro_ready [prio]);
1050		1419
1051	return 0;	1420	return 0;
1052	}	1421	}
…		…
1054	static int	1423	static int
1055	api_ready (SV *coro_sv)	1424	api_ready (SV *coro_sv)
1056	{	1425	{
1057	dTHX;	1426	dTHX;
1058	struct coro *coro;	1427	struct coro *coro;
		1428	SV *sv_hook;
		1429	void (*xs_hook)(void);
1059		1430
1060	if (SvROK (coro_sv))	1431	if (SvROK (coro_sv))
1061	coro_sv = SvRV (coro_sv);	1432	coro_sv = SvRV (coro_sv);
1062		1433
1063	coro = SvSTATE (coro_sv);	1434	coro = SvSTATE (coro_sv);
…		…
1066	return 0;	1437	return 0;
1067		1438
1068	coro->flags |= CF_READY;	1439	coro->flags |= CF_READY;
1069		1440
1070	LOCK;	1441	LOCK;
		1442
		1443	sv_hook = coro_nready ? 0 : coro_readyhook;
		1444	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1445
1071	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));	1446	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1072	++coro_nready;	1447	++coro_nready;
		1448
1073	UNLOCK;	1449	UNLOCK;
		1450
		1451	if (sv_hook)
		1452	{
		1453	dSP;
		1454
		1455	ENTER;
		1456	SAVETMPS;
		1457
		1458	PUSHMARK (SP);
		1459	PUTBACK;
		1460	call_sv (sv_hook, G_DISCARD);
		1461	SPAGAIN;
		1462
		1463	FREETMPS;
		1464	LEAVE;
		1465	}
		1466
		1467	if (xs_hook)
		1468	xs_hook ();
1074		1469
1075	return 1;	1470	return 1;
1076	}	1471	}
1077		1472
1078	static int	1473	static int
…		…
1088	SV *prev_sv, *next_sv;	1483	SV *prev_sv, *next_sv;
1089		1484
1090	for (;;)	1485	for (;;)
1091	{	1486	{
1092	LOCK;	1487	LOCK;
1093	next_sv = coro_deq (aTHX_ PRIO_MIN);	1488	next_sv = coro_deq (aTHX);
1094		1489
1095	/* nothing to schedule: call the idle handler */	1490	/* nothing to schedule: call the idle handler */
1096	if (!next_sv)	1491	if (expect_false (!next_sv))
1097	{	1492	{
1098	dSP;	1493	dSP;
1099	UNLOCK;	1494	UNLOCK;
1100		1495
1101	ENTER;	1496	ENTER;
1102	SAVETMPS;	1497	SAVETMPS;
1103		1498
1104	PUSHMARK (SP);	1499	PUSHMARK (SP);
1105	PUTBACK;	1500	PUTBACK;
1106	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1501	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1502	SPAGAIN;
1107		1503
1108	FREETMPS;	1504	FREETMPS;
1109	LEAVE;	1505	LEAVE;
1110	continue;	1506	continue;
1111	}	1507	}
1112		1508
1113	ta->next = SvSTATE (next_sv);	1509	ta->next = SvSTATE (next_sv);
1114		1510
1115	/* cannot transfer to destroyed coros, skip and look for next */	1511	/* cannot transfer to destroyed coros, skip and look for next */
1116	if (ta->next->flags & CF_DESTROYED)	1512	if (expect_false (ta->next->flags & CF_DESTROYED))
1117	{	1513	{
1118	UNLOCK;	1514	UNLOCK;
1119	SvREFCNT_dec (next_sv);	1515	SvREFCNT_dec (next_sv);
1120	/* coro_nready is already taken care of by destroy */	1516	/* coro_nready is already taken care of by destroy */
1121	continue;	1517	continue;
…		…
1126	break;	1522	break;
1127	}	1523	}
1128		1524
1129	/* free this only after the transfer */	1525	/* free this only after the transfer */
1130	prev_sv = SvRV (coro_current);	1526	prev_sv = SvRV (coro_current);
1131	SvRV_set (coro_current, next_sv);
1132	ta->prev = SvSTATE (prev_sv);	1527	ta->prev = SvSTATE (prev_sv);
1133		1528	TRANSFER_CHECK (*ta);
1134	assert (ta->next->flags & CF_READY);	1529	assert (ta->next->flags & CF_READY);
1135	ta->next->flags &= ~CF_READY;	1530	ta->next->flags &= ~CF_READY;
		1531	SvRV_set (coro_current, next_sv);
1136		1532
1137	LOCK;	1533	LOCK;
1138	free_coro_mortal (aTHX);	1534	free_coro_mortal (aTHX);
1139	coro_mortal = prev_sv;	1535	coro_mortal = prev_sv;
1140	UNLOCK;	1536	UNLOCK;
…		…
1166	{	1562	{
1167	dTHX;	1563	dTHX;
1168	struct transfer_args ta;	1564	struct transfer_args ta;
1169		1565
1170	prepare_schedule (aTHX_ &ta);	1566	prepare_schedule (aTHX_ &ta);
1171	TRANSFER (ta);	1567	TRANSFER (ta, 1);
1172	}	1568	}
1173		1569
1174	static int	1570	static int
1175	api_cede (void)	1571	api_cede (void)
1176	{	1572	{
1177	dTHX;	1573	dTHX;
1178	struct transfer_args ta;	1574	struct transfer_args ta;
1179		1575
1180	prepare_cede (aTHX_ &ta);	1576	prepare_cede (aTHX_ &ta);
1181		1577
1182	if (ta.prev != ta.next)	1578	if (expect_true (ta.prev != ta.next))
1183	{	1579	{
1184	TRANSFER (ta);	1580	TRANSFER (ta, 1);
1185	return 1;	1581	return 1;
1186	}	1582	}
1187	else	1583	else
1188	return 0;	1584	return 0;
1189	}	1585	}
…		…
1194	dTHX;	1590	dTHX;
1195	struct transfer_args ta;	1591	struct transfer_args ta;
1196		1592
1197	if (prepare_cede_notself (aTHX_ &ta))	1593	if (prepare_cede_notself (aTHX_ &ta))
1198	{	1594	{
1199	TRANSFER (ta);	1595	TRANSFER (ta, 1);
1200	return 1;	1596	return 1;
1201	}	1597	}
1202	else	1598	else
1203	return 0;	1599	return 0;
1204	}	1600	}
1205		1601
		1602	static void
		1603	api_trace (SV *coro_sv, int flags)
		1604	{
		1605	dTHX;
		1606	struct coro *coro = SvSTATE (coro_sv);
		1607
		1608	if (flags & CC_TRACE)
		1609	{
		1610	if (!coro->cctx)
		1611	coro->cctx = cctx_new ();
		1612	else if (!(coro->cctx->flags & CC_TRACE))
		1613	croak ("cannot enable tracing on coroutine with custom stack");
		1614
		1615	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1616	}
		1617	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1618	{
		1619	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1620
		1621	if (coro->flags & CF_RUNNING)
		1622	PL_runops = RUNOPS_DEFAULT;
		1623	else
		1624	coro->slot->runops = RUNOPS_DEFAULT;
		1625	}
		1626	}
		1627
1206	MODULE = Coro::State PACKAGE = Coro::State	1628	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1207		1629
1208	PROTOTYPES: DISABLE	1630	PROTOTYPES: DISABLE
1209		1631
1210	BOOT:	1632	BOOT:
1211	{	1633	{
1212	#ifdef USE_ITHREADS	1634	#ifdef USE_ITHREADS
1213	MUTEX_INIT (&coro_mutex);	1635	MUTEX_INIT (&coro_mutex);
1214	#endif	1636	#endif
1215	BOOT_PAGESIZE;	1637	BOOT_PAGESIZE;
1216		1638
		1639	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1640	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1641
		1642	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1643	orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1644	orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
		1645
		1646	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1647	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1648	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1649
1217	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1650	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1218		1651
1219	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1652	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1220	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));	1653	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1221	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1222	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1223	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1224	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));	1654	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1225	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1655	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1226		1656
1227	main_mainstack = PL_mainstack;	1657	main_mainstack = PL_mainstack;
1228	main_top_env = PL_top_env;	1658	main_top_env = PL_top_env;
1229		1659
1230	while (main_top_env->je_prev)	1660	while (main_top_env->je_prev)
1231	main_top_env = main_top_env->je_prev;	1661	main_top_env = main_top_env->je_prev;
1232		1662
1233	coroapi.ver = CORO_API_VERSION;	1663	coroapi.ver = CORO_API_VERSION;
		1664	coroapi.rev = CORO_API_REVISION;
1234	coroapi.transfer = api_transfer;	1665	coroapi.transfer = api_transfer;
1235		1666
1236	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1667	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1237	}	1668	}
1238		1669
1239	SV *	1670	SV *
1240	new (char *klass, ...)	1671	new (char *klass, ...)
1241	CODE:	1672	CODE:
1242	{	1673	{
1243	struct coro *coro;	1674	struct coro *coro;
		1675	MAGIC *mg;
1244	HV *hv;	1676	HV *hv;
1245	int i;	1677	int i;
1246		1678
1247	Newz (0, coro, 1, struct coro);	1679	Newz (0, coro, 1, struct coro);
1248	coro->args = newAV ();	1680	coro->args = newAV ();
1249	coro->save = CORO_SAVE_DEF;
1250	coro->flags = CF_NEW;	1681	coro->flags = CF_NEW;
1251		1682
1252	if (coro_first) coro_first->prev = coro;	1683	if (coro_first) coro_first->prev = coro;
1253	coro->next = coro_first;	1684	coro->next = coro_first;
1254	coro_first = coro;	1685	coro_first = coro;
1255		1686
1256	coro->hv = hv = newHV ();	1687	coro->hv = hv = newHV ();
1257	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1688	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1689	mg->mg_flags |= MGf_DUP;
1258	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1690	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1259		1691
		1692	av_extend (coro->args, items - 1);
1260	for (i = 1; i < items; i++)	1693	for (i = 1; i < items; i++)
1261	av_push (coro->args, newSVsv (ST (i)));	1694	av_push (coro->args, newSVsv (ST (i)));
1262	}	1695	}
1263	OUTPUT:	1696	OUTPUT:
1264	RETVAL	1697	RETVAL
1265		1698
1266	int	1699	# these not obviously related functions are all rolled into the same xs
1267	save (SV *coro, int new_save = -1)	1700	# function to increase chances that they all will call transfer with the same
1268	CODE:	1701	# stack offset
1269	RETVAL = api_save (coro, new_save);
1270	OUTPUT:
1271	RETVAL
1272
1273	int
1274	save_also (SV *coro_sv, int save_also)
1275	CODE:
1276	{
1277	struct coro *coro = SvSTATE (coro_sv);
1278	RETVAL = coro->save;
1279	coro->save |= save_also;
1280	}
1281	OUTPUT:
1282	RETVAL
1283
1284	void	1702	void
1285	_set_stacklevel (...)	1703	_set_stacklevel (...)
1286	ALIAS:	1704	ALIAS:
1287	Coro::State::transfer = 1	1705	Coro::State::transfer = 1
1288	Coro::schedule = 2	1706	Coro::schedule = 2
…		…
1290	Coro::cede_notself = 4	1708	Coro::cede_notself = 4
1291	CODE:	1709	CODE:
1292	{	1710	{
1293	struct transfer_args ta;	1711	struct transfer_args ta;
1294		1712
		1713	PUTBACK;
1295	switch (ix)	1714	switch (ix)
1296	{	1715	{
1297	case 0:	1716	case 0:
1298	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1717	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1299	ta.next = 0;	1718	ta.next = 0;
…		…
1318	if (!prepare_cede_notself (aTHX_ &ta))	1737	if (!prepare_cede_notself (aTHX_ &ta))
1319	XSRETURN_EMPTY;	1738	XSRETURN_EMPTY;
1320		1739
1321	break;	1740	break;
1322	}	1741	}
		1742	SPAGAIN;
1323		1743
1324	BARRIER;	1744	BARRIER;
		1745	PUTBACK;
1325	TRANSFER (ta);	1746	TRANSFER (ta, 0);
1326		1747	SPAGAIN; /* might be the sp of a different coroutine now */
1327	if (GIMME_V != G_VOID && ta.next != ta.prev)	1748	/* be extra careful not to ever do anything after TRANSFER */
1328	XSRETURN_YES;
1329	}	1749	}
1330		1750
1331	bool	1751	bool
1332	_destroy (SV *coro_sv)	1752	_destroy (SV *coro_sv)
1333	CODE:	1753	CODE:
1334	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	1754	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1335	OUTPUT:	1755	OUTPUT:
1336	RETVAL	1756	RETVAL
1337		1757
1338	void	1758	void
1339	_exit (code)	1759	_exit (int code)
1340	int code
1341	PROTOTYPE: $	1760	PROTOTYPE: $
1342	CODE:	1761	CODE:
1343	_exit (code);	1762	_exit (code);
1344		1763
1345	int	1764	int
…		…
1374	if (coro->hv)	1793	if (coro->hv)
1375	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));	1794	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1376	}	1795	}
1377		1796
1378	void	1797	void
1379	_eval (Coro::State coro, SV *coderef)	1798	call (Coro::State coro, SV *coderef)
		1799	ALIAS:
		1800	eval = 1
1380	CODE:	1801	CODE:
1381	{	1802	{
1382	if (coro->mainstack)	1803	if (coro->mainstack)
1383	{	1804	{
1384	struct coro temp;	1805	struct coro temp;
1385	Zero (&temp, 1, struct coro);
1386	temp.save = CORO_SAVE_ALL;
1387		1806
1388	if (!(coro->flags & CF_RUNNING))	1807	if (!(coro->flags & CF_RUNNING))
1389	{	1808	{
		1809	PUTBACK;
1390	save_perl (aTHX_ &temp);	1810	save_perl (aTHX_ &temp);
1391	load_perl (aTHX_ coro);	1811	load_perl (aTHX_ coro);
1392	}	1812	}
1393		1813
1394	{	1814	{
1395	dSP;	1815	dSP;
1396	ENTER;	1816	ENTER;
1397	SAVETMPS;	1817	SAVETMPS;
		1818	PUTBACK;
		1819	PUSHSTACK;
1398	PUSHMARK (SP);	1820	PUSHMARK (SP);
1399	PUTBACK;	1821
		1822	if (ix)
		1823	eval_sv (coderef, 0);
		1824	else
1400	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);	1825	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1826
		1827	POPSTACK;
1401	SPAGAIN;	1828	SPAGAIN;
1402	FREETMPS;	1829	FREETMPS;
1403	LEAVE;	1830	LEAVE;
1404	PUTBACK;	1831	PUTBACK;
1405	}	1832	}
1406		1833
1407	if (!(coro->flags & CF_RUNNING))	1834	if (!(coro->flags & CF_RUNNING))
1408	{	1835	{
1409	save_perl (aTHX_ coro);	1836	save_perl (aTHX_ coro);
1410	load_perl (aTHX_ &temp);	1837	load_perl (aTHX_ &temp);
		1838	SPAGAIN;
1411	}	1839	}
1412	}	1840	}
1413	}	1841	}
1414		1842
1415	SV *	1843	SV *
1416	is_ready (Coro::State coro)	1844	is_ready (Coro::State coro)
1417	PROTOTYPE: $	1845	PROTOTYPE: $
1418	ALIAS:	1846	ALIAS:
1419	is_ready = CF_READY	1847	is_ready = CF_READY
…		…
1423	CODE:	1851	CODE:
1424	RETVAL = boolSV (coro->flags & ix);	1852	RETVAL = boolSV (coro->flags & ix);
1425	OUTPUT:	1853	OUTPUT:
1426	RETVAL	1854	RETVAL
1427		1855
		1856	void
		1857	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1858
		1859	SV *
		1860	has_cctx (Coro::State coro)
		1861	PROTOTYPE: $
		1862	CODE:
		1863	RETVAL = boolSV (!!coro->cctx);
		1864	OUTPUT:
		1865	RETVAL
		1866
		1867	int
		1868	is_traced (Coro::State coro)
		1869	PROTOTYPE: $
		1870	CODE:
		1871	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1872	OUTPUT:
		1873	RETVAL
		1874
1428	IV	1875	IV
1429	rss (Coro::State coro)	1876	rss (Coro::State coro)
1430	PROTOTYPE: $	1877	PROTOTYPE: $
		1878	ALIAS:
		1879	usecount = 1
1431	CODE:	1880	CODE:
1432	RETVAL = coro_rss (coro);	1881	switch (ix)
		1882	{
		1883	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1884	case 1: RETVAL = coro->usecount; break;
		1885	}
1433	OUTPUT:	1886	OUTPUT:
1434	RETVAL	1887	RETVAL
1435		1888
		1889	void
		1890	force_cctx ()
		1891	CODE:
		1892	struct coro *coro = SvSTATE (coro_current);
		1893	coro->cctx->idle_sp = 0;
1436		1894
1437	MODULE = Coro::State PACKAGE = Coro	1895	MODULE = Coro::State PACKAGE = Coro
1438		1896
1439	BOOT:	1897	BOOT:
1440	{	1898	{
1441	int i;	1899	int i;
1442		1900
		1901	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1902	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1903	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1904
		1905	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1906	SvREADONLY_on (coro_current);
		1907
1443	coro_stash = gv_stashpv ("Coro", TRUE);	1908	coro_stash = gv_stashpv ("Coro", TRUE);
1444		1909
1445	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1910	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1446	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1911	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1447	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1912	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1448	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1913	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1449	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1914	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1450	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1915	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1451		1916
1452	coro_current = get_sv ("Coro::current", FALSE);
1453	SvREADONLY_on (coro_current);
1454
1455	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1917	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1456	coro_ready[i] = newAV ();	1918	coro_ready[i] = newAV ();
1457		1919
1458	{	1920	{
1459	SV *sv = perl_get_sv("Coro::API", 1);	1921	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1922	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1460		1923
1461	coroapi.schedule = api_schedule;	1924	coroapi.schedule = api_schedule;
1462	coroapi.save = api_save;
1463	coroapi.cede = api_cede;	1925	coroapi.cede = api_cede;
1464	coroapi.cede_notself = api_cede_notself;	1926	coroapi.cede_notself = api_cede_notself;
1465	coroapi.ready = api_ready;	1927	coroapi.ready = api_ready;
1466	coroapi.is_ready = api_is_ready;	1928	coroapi.is_ready = api_is_ready;
1467	coroapi.nready = &coro_nready;	1929	coroapi.nready = &coro_nready;
…		…
1477	_set_current (SV *current)	1939	_set_current (SV *current)
1478	PROTOTYPE: $	1940	PROTOTYPE: $
1479	CODE:	1941	CODE:
1480	SvREFCNT_dec (SvRV (coro_current));	1942	SvREFCNT_dec (SvRV (coro_current));
1481	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1943	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1944
		1945	void
		1946	_set_readyhook (SV *hook)
		1947	PROTOTYPE: $
		1948	CODE:
		1949	LOCK;
		1950	SvREFCNT_dec (coro_readyhook);
		1951	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		1952	UNLOCK;
1482		1953
1483	int	1954	int
1484	prio (Coro::State coro, int newprio = 0)	1955	prio (Coro::State coro, int newprio = 0)
1485	ALIAS:	1956	ALIAS:
1486	nice = 1	1957	nice = 1
…		…
1516	CODE:	1987	CODE:
1517	RETVAL = coro_nready;	1988	RETVAL = coro_nready;
1518	OUTPUT:	1989	OUTPUT:
1519	RETVAL	1990	RETVAL
1520		1991
		1992	void
		1993	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1994	PROTOTYPE: $;$
		1995	CODE:
		1996	SvREFCNT_dec (self->throw);
		1997	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1998
		1999	void
		2000	swap_defsv (Coro::State self)
		2001	PROTOTYPE: $
		2002	ALIAS:
		2003	swap_defav = 1
		2004	CODE:
		2005	if (!self->slot)
		2006	croak ("cannot swap state with coroutine that has no saved state");
		2007	else
		2008	{
		2009	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		2010	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		2011
		2012	SV *tmp = *src; *src = *dst; *dst = tmp;
		2013	}
		2014
		2015	# for async_pool speedup
		2016	void
		2017	_pool_1 (SV *cb)
		2018	CODE:
		2019	{
		2020	struct coro *coro = SvSTATE (coro_current);
		2021	HV *hv = (HV *)SvRV (coro_current);
		2022	AV *defav = GvAV (PL_defgv);
		2023	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		2024	AV *invoke_av;
		2025	int i, len;
		2026
		2027	if (!invoke)
		2028	{
		2029	SV *old = PL_diehook;
		2030	PL_diehook = 0;
		2031	SvREFCNT_dec (old);
		2032	croak ("\3async_pool terminate\2\n");
		2033	}
		2034
		2035	SvREFCNT_dec (coro->saved_deffh);
		2036	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		2037
		2038	hv_store (hv, "desc", sizeof ("desc") - 1,
		2039	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		2040
		2041	invoke_av = (AV *)SvRV (invoke);
		2042	len = av_len (invoke_av);
		2043
		2044	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		2045
		2046	if (len > 0)
		2047	{
		2048	av_fill (defav, len - 1);
		2049	for (i = 0; i < len; ++i)
		2050	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		2051	}
		2052
		2053	SvREFCNT_dec (invoke);
		2054	}
		2055
		2056	void
		2057	_pool_2 (SV *cb)
		2058	CODE:
		2059	{
		2060	struct coro *coro = SvSTATE (coro_current);
		2061
		2062	sv_setsv (cb, &PL_sv_undef);
		2063
		2064	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		2065	coro->saved_deffh = 0;
		2066
		2067	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		2068	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2069	{
		2070	SV *old = PL_diehook;
		2071	PL_diehook = 0;
		2072	SvREFCNT_dec (old);
		2073	croak ("\3async_pool terminate\2\n");
		2074	}
		2075
		2076	av_clear (GvAV (PL_defgv));
		2077	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		2078	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		2079
		2080	coro->prio = 0;
		2081
		2082	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2083	api_trace (coro_current, 0);
		2084
		2085	av_push (av_async_pool, newSVsv (coro_current));
		2086	}
		2087
		2088
1521	MODULE = Coro::State PACKAGE = Coro::AIO	2089	MODULE = Coro::State PACKAGE = Coro::AIO
1522		2090
1523	SV *	2091	SV *
1524	_get_state ()	2092	_get_state ()
1525	CODE:	2093	CODE:
…		…
1550	PL_laststype = data->laststype;	2118	PL_laststype = data->laststype;
1551	PL_laststatval = data->laststatval;	2119	PL_laststatval = data->laststatval;
1552	PL_statcache = data->statcache;	2120	PL_statcache = data->statcache;
1553	}	2121	}
1554		2122
		2123
		2124	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2125
		2126	BOOT:
		2127	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2128
		2129	SV *
		2130	_schedule (...)
		2131	PROTOTYPE: @
		2132	CODE:
		2133	{
		2134	static int incede;
		2135
		2136	api_cede_notself ();
		2137
		2138	++incede;
		2139	while (coro_nready >= incede && api_cede ())
		2140	;
		2141
		2142	sv_setsv (sv_activity, &PL_sv_undef);
		2143	if (coro_nready >= incede)
		2144	{
		2145	PUSHMARK (SP);
		2146	PUTBACK;
		2147	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
		2148	SPAGAIN;
		2149	}
		2150
		2151	--incede;
		2152	}
		2153

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