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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 1.240 by root, Sun Jun 29 00:28:17 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
…		…
88	/* prefer perl internal functions over our own? */	111	/* prefer perl internal functions over our own? */
89	#ifndef CORO_PREFER_PERL_FUNCTIONS	112	#ifndef CORO_PREFER_PERL_FUNCTIONS
90	# define CORO_PREFER_PERL_FUNCTIONS 0	113	# define CORO_PREFER_PERL_FUNCTIONS 0
91	#endif	114	#endif
92		115
93	/* The next macro should declare a variable stacklevel that contains and approximation	116	/* 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	117	* portable way as possible. */
95	* and should be unique. */
96	#define dSTACKLEVEL int stacklevel	118	#define dSTACKLEVEL volatile char stacklevel
97	#define STACKLEVEL ((void *)&stacklevel)	119	#define STACKLEVEL ((void *)&stacklevel)
98		120
99	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
100		122
101	#if __GNUC__ >= 3	123	#if __GNUC__ >= 3
102	# define attribute(x) __attribute__(x)	124	# define attribute(x) __attribute__(x)
103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
104	#else	127	#else
105	# define attribute(x)	128	# define attribute(x)
106	# define BARRIER	129	# define BARRIER
		130	# define expect(expr,value) (expr)
107	#endif	131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
108		135
109	#define NOINLINE attribute ((noinline))	136	#define NOINLINE attribute ((noinline))
110		137
111	#include "CoroAPI.h"	138	#include "CoroAPI.h"
112		139
…		…
129	};	156	};
130		157
131	static size_t coro_stacksize = CORO_STACKSIZE;	158	static size_t coro_stacksize = CORO_STACKSIZE;
132	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
133	static AV *main_mainstack; /* used to differentiate between $main and others */	160	static AV *main_mainstack; /* used to differentiate between $main and others */
		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	SV *irssv; /* $/ */
183	SV *irssv_sv; /* real $/ cache */
184
185	#define VAR(name,type) type name;
186	# include "state.h"
187	#undef VAR
188		247
189	/* coro process data */	248	/* coro process data */
190	int prio;	249	int prio;
		250	SV *throw; /* exception to be thrown */
		251
		252	/* async_pool */
		253	SV *saved_deffh;
		254
		255	/* linked list */
		256	struct coro *next, *prev;
191	};	257	};
192		258
193	typedef struct coro *Coro__State;	259	typedef struct coro *Coro__State;
194	typedef struct coro *Coro__State_or_hashref;	260	typedef struct coro *Coro__State_or_hashref;
195		261
…		…
202	#define PRIO_IDLE -3	268	#define PRIO_IDLE -3
203	#define PRIO_MIN -4	269	#define PRIO_MIN -4
204		270
205	/* for Coro.pm */	271	/* for Coro.pm */
206	static SV *coro_current;	272	static SV *coro_current;
		273	static SV *coro_readyhook;
207	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
208	static int coro_nready;	275	static int coro_nready;
		276	static struct coro *coro_first;
209		277
210	/** lowlevel stuff **********************************************************/	278	/** lowlevel stuff **********************************************************/
		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	}
211		309
212	static AV *	310	static AV *
213	coro_clone_padlist (pTHX_ CV *cv)	311	coro_clone_padlist (pTHX_ CV *cv)
214	{	312	{
215	AV *padlist = CvPADLIST (cv);	313	AV *padlist = CvPADLIST (cv);
216	AV *newpadlist, *newpad;	314	AV *newpadlist, *newpad;
217		315
218	newpadlist = newAV ();	316	newpadlist = newAV ();
219	AvREAL_off (newpadlist);	317	AvREAL_off (newpadlist);
220	#if PERL_VERSION_ATLEAST (5,9,0)	318	#if PERL_VERSION_ATLEAST (5,10,0)
221	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	319	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
222	#else	320	#else
223	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
224	#endif	322	#endif
225	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
263		361
264	/* casting is fun. */	362	/* casting is fun. */
265	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	363	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266	free_padlist (aTHX_ padlist);	364	free_padlist (aTHX_ padlist);
267		365
268	SvREFCNT_dec (av);
269
270	return 0;	366	return 0;
271	}	367	}
272		368
273	#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
274		371
275	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	};
276		376
277	#define CORO_MAGIC(cv) \	377	#define CORO_MAGIC(sv,type) \
278	SvMAGIC (cv) \	378	SvMAGIC (sv) \
279	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	379	? SvMAGIC (sv)->mg_type == type \
280	? SvMAGIC (cv) \	380	? SvMAGIC (sv) \
281	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	381	: mg_find (sv, type) \
282	: 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))
283		412
284	/* the next two functions merely cache the padlists */	413	/* the next two functions merely cache the padlists */
285	static void	414	static void
286	get_padlist (pTHX_ CV *cv)	415	get_padlist (pTHX_ CV *cv)
287	{	416	{
288	MAGIC *mg = CORO_MAGIC (cv);	417	MAGIC *mg = CORO_MAGIC_cv (cv);
289	AV *av;	418	AV *av;
290		419
291	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	420	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
292	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	421	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
293	else	422	else
294	{	423	{
295	#if CORO_PREFER_PERL_FUNCTIONS	424	#if CORO_PREFER_PERL_FUNCTIONS
296	/* this is probably cleaner, but also slower? */	425	/* this is probably cleaner, but also slower? */
…		…
305	}	434	}
306		435
307	static void	436	static void
308	put_padlist (pTHX_ CV *cv)	437	put_padlist (pTHX_ CV *cv)
309	{	438	{
310	MAGIC *mg = CORO_MAGIC (cv);	439	MAGIC *mg = CORO_MAGIC_cv (cv);
311	AV *av;	440	AV *av;
312		441
313	if (!mg)	442	if (expect_false (!mg))
314	{	443	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		444
321	av = (AV *)mg->mg_obj;	445	av = (AV *)mg->mg_obj;
322		446
323	if (AvFILLp (av) >= AvMAX (av))	447	if (expect_false (AvFILLp (av) >= AvMAX (av)))
324	av_extend (av, AvMAX (av) + 1);	448	av_extend (av, AvMAX (av) + 1);
325		449
326	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	450	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
327	}	451	}
328		452
329	/** load & save, init *******************************************************/	453	/** 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		454
336	static void	455	static void
337	load_perl (pTHX_ Coro__State c)	456	load_perl (pTHX_ Coro__State c)
338	{	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
339	#define VAR(name,type) PL_ ## name = c->name;	468	#define VAR(name,type) PL_ ## name = slot->name;
340	# include "state.h"	469	# include "state.h"
341	#undef VAR	470	#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		471
358	{	472	{
359	dSP;	473	dSP;
		474
360	CV *cv;	475	CV *cv;
361		476
362	/* now do the ugly restore mess */	477	/* now do the ugly restore mess */
363	while ((cv = (CV *)POPs))	478	while (expect_true (cv = (CV *)POPs))
364	{	479	{
365	put_padlist (aTHX_ cv); /* mark this padlist as available */	480	put_padlist (aTHX_ cv); /* mark this padlist as available */
366	CvDEPTH (cv) = PTR2IV (POPs);	481	CvDEPTH (cv) = PTR2IV (POPs);
367	CvPADLIST (cv) = (AV *)POPs;	482	CvPADLIST (cv) = (AV *)POPs;
368	}	483	}
369		484
370	PUTBACK;	485	PUTBACK;
371	}	486	}
372	assert (!PL_comppad || AvARRAY (PL_comppad));//D
373	}	487	}
374		488
375	static void	489	static void
376	save_perl (pTHX_ Coro__State c)	490	save_perl (pTHX_ Coro__State c)
377	{	491	{
378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
379	{	492	{
380	dSP;	493	dSP;
381	I32 cxix = cxstack_ix;	494	I32 cxix = cxstack_ix;
382	PERL_CONTEXT *ccstk = cxstack;	495	PERL_CONTEXT *ccstk = cxstack;
383	PERL_SI *top_si = PL_curstackinfo;	496	PERL_SI *top_si = PL_curstackinfo;
…		…
385	/*	498	/*
386	* the worst thing you can imagine happens first - we have to save	499	* the worst thing you can imagine happens first - we have to save
387	* (and reinitialize) all cv's in the whole callchain :(	500	* (and reinitialize) all cv's in the whole callchain :(
388	*/	501	*/
389		502
390	EXTEND (SP, 3 + 1);
391	PUSHs (Nullsv);	503	XPUSHs (Nullsv);
392	/* this loop was inspired by pp_caller */	504	/* this loop was inspired by pp_caller */
393	for (;;)	505	for (;;)
394	{	506	{
395	while (cxix >= 0)	507	while (expect_true (cxix >= 0))
396	{	508	{
397	PERL_CONTEXT *cx = &ccstk[cxix--];	509	PERL_CONTEXT *cx = &ccstk[cxix--];
398		510
399	if (CxTYPE (cx) == CXt_SUB)	511	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
400	{	512	{
401	CV *cv = cx->blk_sub.cv;	513	CV *cv = cx->blk_sub.cv;
402		514
403	if (CvDEPTH (cv))	515	if (expect_true (CvDEPTH (cv)))
404	{	516	{
405	EXTEND (SP, 3);	517	EXTEND (SP, 3);
406	PUSHs ((SV *)CvPADLIST (cv));	518	PUSHs ((SV *)CvPADLIST (cv));
407	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	519	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
408	PUSHs ((SV *)cv);	520	PUSHs ((SV *)cv);
409		521
410	CvDEPTH (cv) = 0;	522	CvDEPTH (cv) = 0;
411	get_padlist (aTHX_ cv);	523	get_padlist (aTHX_ cv);
412	}	524	}
413	}	525	}
414	}	526	}
415		527
416	if (top_si->si_type == PERLSI_MAIN)	528	if (expect_true (top_si->si_type == PERLSI_MAIN))
417	break;	529	break;
418		530
419	top_si = top_si->si_prev;	531	top_si = top_si->si_prev;
420	ccstk = top_si->si_cxstack;	532	ccstk = top_si->si_cxstack;
421	cxix = top_si->si_cxix;	533	cxix = top_si->si_cxix;
422	}	534	}
423		535
424	PUTBACK;	536	PUTBACK;
425	}	537	}
426		538
427	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 */
428	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	540	/* we manually unroll here, as usually 2 slots is enough */
429	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	541	if (SLOT_COUNT >= 1) CXINC;
430	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	542	if (SLOT_COUNT >= 2) CXINC;
		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 */
431		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
432	#define VAR(name,type)c->name = PL_ ## name;	561	#define VAR(name,type) slot->name = PL_ ## name;
433	# include "state.h"	562	# include "state.h"
434	#undef VAR	563	#undef VAR
		564	}
435	}	565	}
436		566
437	/*	567	/*
438	* allocate various perl stacks. This is an exact copy	568	* allocate various perl stacks. This is an exact copy
439	* of perl.c:init_stacks, except that it uses less memory	569	* of perl.c:init_stacks, except that it uses less memory
…		…
444	# define coro_init_stacks init_stacks	574	# define coro_init_stacks init_stacks
445	#else	575	#else
446	static void	576	static void
447	coro_init_stacks (pTHX)	577	coro_init_stacks (pTHX)
448	{	578	{
449	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	579	PL_curstackinfo = new_stackinfo(32, 8);
450	PL_curstackinfo->si_type = PERLSI_MAIN;	580	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	581	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	582	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		583
454	PL_stack_base = AvARRAY(PL_curstack);	584	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	585	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	586	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		587
458	New(50,PL_tmps_stack,128,SV*);	588	New(50,PL_tmps_stack,32,SV*);
459	PL_tmps_floor = -1;	589	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	590	PL_tmps_ix = -1;
461	PL_tmps_max = 128;	591	PL_tmps_max = 32;
462		592
463	New(54,PL_markstack,32,I32);	593	New(54,PL_markstack,16,I32);
464	PL_markstack_ptr = PL_markstack;	594	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 32;	595	PL_markstack_max = PL_markstack + 16;
466		596
467	#ifdef SET_MARK_OFFSET	597	#ifdef SET_MARK_OFFSET
468	SET_MARK_OFFSET;	598	SET_MARK_OFFSET;
469	#endif	599	#endif
470		600
471	New(54,PL_scopestack,32,I32);	601	New(54,PL_scopestack,8,I32);
472	PL_scopestack_ix = 0;	602	PL_scopestack_ix = 0;
473	PL_scopestack_max = 32;	603	PL_scopestack_max = 8;
474		604
475	New(54,PL_savestack,64,ANY);	605	New(54,PL_savestack,24,ANY);
476	PL_savestack_ix = 0;	606	PL_savestack_ix = 0;
477	PL_savestack_max = 64;	607	PL_savestack_max = 24;
478		608
479	#if !PERL_VERSION_ATLEAST (5,9,0)	609	#if !PERL_VERSION_ATLEAST (5,10,0)
480	New(54,PL_retstack,16,OP*);	610	New(54,PL_retstack,4,OP*);
481	PL_retstack_ix = 0;	611	PL_retstack_ix = 0;
482	PL_retstack_max = 16;	612	PL_retstack_max = 4;
483	#endif	613	#endif
484	}	614	}
485	#endif	615	#endif
486		616
487	/*	617	/*
488	* destroy the stacks, the callchain etc...	618	* destroy the stacks, the callchain etc...
489	*/	619	*/
490	static void	620	static void
491	coro_destroy_stacks (pTHX)	621	coro_destroy_stacks (pTHX)
492	{	622	{
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)	623	while (PL_curstackinfo->si_next)
511	PL_curstackinfo = PL_curstackinfo->si_next;	624	PL_curstackinfo = PL_curstackinfo->si_next;
512		625
513	while (PL_curstackinfo)	626	while (PL_curstackinfo)
514	{	627	{
…		…
524		637
525	Safefree (PL_tmps_stack);	638	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	639	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	640	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	641	Safefree (PL_savestack);
529	#if !PERL_VERSION_ATLEAST (5,9,0)	642	#if !PERL_VERSION_ATLEAST (5,10,0)
530	Safefree (PL_retstack);	643	Safefree (PL_retstack);
531	#endif	644	#endif
532	}	645	}
533		646
		647	static size_t
		648	coro_rss (pTHX_ struct coro *coro)
		649	{
		650	size_t rss = sizeof (*coro);
		651
		652	if (coro->mainstack)
		653	{
		654	perl_slots tmp_slot;
		655	perl_slots *slot;
		656
		657	if (coro->flags & CF_RUNNING)
		658	{
		659	slot = &tmp_slot;
		660
		661	#define VAR(name,type) slot->name = PL_ ## name;
		662	# include "state.h"
		663	#undef VAR
		664	}
		665	else
		666	slot = coro->slot;
		667
		668	rss += sizeof (slot->curstackinfo);
		669	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		670	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		671	rss += slot->tmps_max * sizeof (SV *);
		672	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		673	rss += slot->scopestack_max * sizeof (I32);
		674	rss += slot->savestack_max * sizeof (ANY);
		675
		676	#if !PERL_VERSION_ATLEAST (5,10,0)
		677	rss += slot->retstack_max * sizeof (OP *);
		678	#endif
		679	}
		680
		681	return rss;
		682	}
		683
534	/** coroutine stack handling ************************************************/	684	/** coroutine stack handling ************************************************/
535		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	#undef MgPV_nolen_const
		692	#ifndef MgPV_nolen_const
		693	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		694	SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \
		695	(const char*)(mg)->mg_ptr)
		696	#endif
		697
		698	/*
		699	* This overrides the default magic get method of %SIG elements.
		700	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		701	* and instead of tryign to save and restore the hash elements, we just provide
		702	* readback here.
		703	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		704	* not expecting this to actually change the hook. This is a potential problem
		705	* when a schedule happens then, but we ignore this.
		706	*/
		707	static int
		708	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		709	{
		710	const char *s = MgPV_nolen_const (mg);
		711
		712	if (*s == '_')
		713	{
		714	SV **svp = 0;
		715
		716	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		717	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		718
		719	if (svp)
		720	{
		721	sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
		722	return 0;
		723	}
		724	}
		725
		726	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		727	}
		728
		729	static int
		730	coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
		731	{
		732	const char *s = MgPV_nolen_const (mg);
		733
		734	if (*s == '_')
		735	{
		736	SV **svp = 0;
		737
		738	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		739	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		740
		741	if (svp)
		742	{
		743	SV *old = *svp;
		744	*svp = 0;
		745	SvREFCNT_dec (old);
		746	return 0;
		747	}
		748	}
		749
		750	return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
		751	}
		752
		753	static int
		754	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		755	{
		756	const char *s = MgPV_nolen_const (mg);
		757
		758	if (*s == '_')
		759	{
		760	SV **svp = 0;
		761
		762	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		763	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		764
		765	if (svp)
		766	{
		767	SV *old = *svp;
		768	*svp = newSVsv (sv);
		769	SvREFCNT_dec (old);
		770	return 0;
		771	}
		772	}
		773
		774	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		775	}
		776
536	static void	777	static void
537	setup_coro (pTHX_ struct coro *coro)	778	coro_setup (pTHX_ struct coro *coro)
538	{	779	{
539	/*	780	/*
540	* emulate part of the perl startup here.	781	* emulate part of the perl startup here.
541	*/	782	*/
542	coro_init_stacks (aTHX);	783	coro_init_stacks (aTHX);
543		784
		785	PL_runops = RUNOPS_DEFAULT;
544	PL_curcop = &PL_compiling;	786	PL_curcop = &PL_compiling;
545	PL_in_eval = EVAL_NULL;	787	PL_in_eval = EVAL_NULL;
546	PL_comppad = 0;	788	PL_comppad = 0;
547	PL_curpm = 0;	789	PL_curpm = 0;
		790	PL_curpad = 0;
548	PL_localizing = 0;	791	PL_localizing = 0;
549	PL_dirty = 0;	792	PL_dirty = 0;
550	PL_restartop = 0;	793	PL_restartop = 0;
		794	#if PERL_VERSION_ATLEAST (5,10,0)
		795	PL_parser = 0;
		796	#endif
		797
		798	/* recreate the die/warn hooks */
		799	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		800	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		801
		802	GvSV (PL_defgv) = newSV (0);
		803	GvAV (PL_defgv) = coro->args; coro->args = 0;
		804	GvSV (PL_errgv) = newSV (0);
		805	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		806	PL_rs = newSVsv (GvSV (irsgv));
		807	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
551		808
552	{	809	{
553	dSP;	810	dSP;
554	LOGOP myop;	811	LOGOP myop;
555		812
556	SvREFCNT_dec (GvAV (PL_defgv));
557	GvAV (PL_defgv) = coro->args; coro->args = 0;
558
559	Zero (&myop, 1, LOGOP);	813	Zero (&myop, 1, LOGOP);
560	myop.op_next = Nullop;	814	myop.op_next = Nullop;
561	myop.op_flags = OPf_WANT_VOID;	815	myop.op_flags = OPf_WANT_VOID;
562		816
563	PUSHMARK (SP);	817	PUSHMARK (SP);
564	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	818	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
565	PUTBACK;	819	PUTBACK;
566	PL_op = (OP *)&myop;	820	PL_op = (OP *)&myop;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	821	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	822	SPAGAIN;
569	}	823	}
570		824
571	ENTER; /* necessary e.g. for dounwind */	825	/* this newly created coroutine might be run on an existing cctx which most
		826	* likely was suspended in set_stacklevel, called from entersub.
		827	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		828	* so we ENTER here for symmetry
		829	*/
		830	ENTER;
		831	}
		832
		833	static void
		834	coro_destroy (pTHX_ struct coro *coro)
		835	{
		836	if (!IN_DESTRUCT)
		837	{
		838	/* restore all saved variables and stuff */
		839	LEAVE_SCOPE (0);
		840	assert (PL_tmps_floor == -1);
		841
		842	/* free all temporaries */
		843	FREETMPS;
		844	assert (PL_tmps_ix == -1);
		845
		846	/* unwind all extra stacks */
		847	POPSTACK_TO (PL_mainstack);
		848
		849	/* unwind main stack */
		850	dounwind (-1);
		851	}
		852
		853	SvREFCNT_dec (GvSV (PL_defgv));
		854	SvREFCNT_dec (GvAV (PL_defgv));
		855	SvREFCNT_dec (GvSV (PL_errgv));
		856	SvREFCNT_dec (PL_defoutgv);
		857	SvREFCNT_dec (PL_rs);
		858	SvREFCNT_dec (GvSV (irsgv));
		859
		860	SvREFCNT_dec (PL_diehook);
		861	SvREFCNT_dec (PL_warnhook);
		862
		863	SvREFCNT_dec (coro->saved_deffh);
		864	SvREFCNT_dec (coro->throw);
		865
		866	coro_destroy_stacks (aTHX);
572	}	867	}
573		868
574	static void	869	static void
575	free_coro_mortal (pTHX)	870	free_coro_mortal (pTHX)
576	{	871	{
577	if (coro_mortal)	872	if (expect_true (coro_mortal))
578	{	873	{
579	SvREFCNT_dec (coro_mortal);	874	SvREFCNT_dec (coro_mortal);
580	coro_mortal = 0;	875	coro_mortal = 0;
581	}	876	}
582	}	877	}
583		878
		879	static int
		880	runops_trace (pTHX)
		881	{
		882	COP *oldcop = 0;
		883	int oldcxix = -2;
		884	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		885	coro_cctx *cctx = coro->cctx;
		886
		887	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		888	{
		889	PERL_ASYNC_CHECK ();
		890
		891	if (cctx->flags & CC_TRACE_ALL)
		892	{
		893	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		894	{
		895	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		896	SV **bot, **top;
		897	AV *av = newAV (); /* return values */
		898	SV **cb;
		899	dSP;
		900
		901	GV *gv = CvGV (cx->blk_sub.cv);
		902	SV *fullname = sv_2mortal (newSV (0));
		903	if (isGV (gv))
		904	gv_efullname3 (fullname, gv, 0);
		905
		906	bot = PL_stack_base + cx->blk_oldsp + 1;
		907	top = cx->blk_gimme == G_ARRAY ? SP + 1
		908	: cx->blk_gimme == G_SCALAR ? bot + 1
		909	: bot;
		910
		911	av_extend (av, top - bot);
		912	while (bot < top)
		913	av_push (av, SvREFCNT_inc (*bot++));
		914
		915	PL_runops = RUNOPS_DEFAULT;
		916	ENTER;
		917	SAVETMPS;
		918	EXTEND (SP, 3);
		919	PUSHMARK (SP);
		920	PUSHs (&PL_sv_no);
		921	PUSHs (fullname);
		922	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		923	PUTBACK;
		924	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		925	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		926	SPAGAIN;
		927	FREETMPS;
		928	LEAVE;
		929	PL_runops = runops_trace;
		930	}
		931
		932	if (oldcop != PL_curcop)
		933	{
		934	oldcop = PL_curcop;
		935
		936	if (PL_curcop != &PL_compiling)
		937	{
		938	SV **cb;
		939
		940	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		941	{
		942	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		943
		944	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		945	{
		946	runops_proc_t old_runops = PL_runops;
		947	dSP;
		948	GV *gv = CvGV (cx->blk_sub.cv);
		949	SV *fullname = sv_2mortal (newSV (0));
		950
		951	if (isGV (gv))
		952	gv_efullname3 (fullname, gv, 0);
		953
		954	PL_runops = RUNOPS_DEFAULT;
		955	ENTER;
		956	SAVETMPS;
		957	EXTEND (SP, 3);
		958	PUSHMARK (SP);
		959	PUSHs (&PL_sv_yes);
		960	PUSHs (fullname);
		961	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		962	PUTBACK;
		963	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		964	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		965	SPAGAIN;
		966	FREETMPS;
		967	LEAVE;
		968	PL_runops = runops_trace;
		969	}
		970
		971	oldcxix = cxstack_ix;
		972	}
		973
		974	if (cctx->flags & CC_TRACE_LINE)
		975	{
		976	dSP;
		977
		978	PL_runops = RUNOPS_DEFAULT;
		979	ENTER;
		980	SAVETMPS;
		981	EXTEND (SP, 3);
		982	PL_runops = RUNOPS_DEFAULT;
		983	PUSHMARK (SP);
		984	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		985	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		986	PUTBACK;
		987	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		988	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		989	SPAGAIN;
		990	FREETMPS;
		991	LEAVE;
		992	PL_runops = runops_trace;
		993	}
		994	}
		995	}
		996	}
		997	}
		998
		999	TAINT_NOT;
		1000	return 0;
		1001	}
		1002
584	/* inject a fake call to Coro::State::_cctx_init into the execution */	1003	/* inject a fake call to Coro::State::_cctx_init into the execution */
		1004	/* _cctx_init should be careful, as it could be called at almost any time */
		1005	/* during execution of a perl program */
585	static void NOINLINE	1006	static void NOINLINE
586	prepare_cctx (pTHX_ coro_cctx *cctx)	1007	cctx_prepare (pTHX_ coro_cctx *cctx)
587	{	1008	{
588	dSP;	1009	dSP;
589	LOGOP myop;	1010	LOGOP myop;
		1011
		1012	PL_top_env = &PL_start_env;
		1013
		1014	if (cctx->flags & CC_TRACE)
		1015	PL_runops = runops_trace;
590		1016
591	Zero (&myop, 1, LOGOP);	1017	Zero (&myop, 1, LOGOP);
592	myop.op_next = PL_op;	1018	myop.op_next = PL_op;
593	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	1019	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
594		1020
…		…
600	PL_op = (OP *)&myop;	1026	PL_op = (OP *)&myop;
601	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1027	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
602	SPAGAIN;	1028	SPAGAIN;
603	}	1029	}
604		1030
		1031	/*
		1032	* this is a _very_ stripped down perl interpreter ;)
		1033	*/
605	static void	1034	static void
606	coro_run (void *arg)	1035	cctx_run (void *arg)
607	{	1036	{
608	dTHX;	1037	dTHX;
609		1038
610	/* coro_run is the alternative tail of transfer(), so unlock here. */	1039	/* cctx_run is the alternative tail of transfer(), so unlock here. */
611	UNLOCK;	1040	UNLOCK;
612		1041
613	/*	1042	/* we now skip the entersub that lead to transfer() */
614	* this is a _very_ stripped down perl interpreter ;)	1043	PL_op = PL_op->op_next;
615	*/
616	PL_top_env = &PL_start_env;
617		1044
618	/* inject call to cctx_init */	1045	/* inject a fake subroutine call to cctx_init */
619	prepare_cctx (aTHX_ (coro_cctx *)arg);	1046	cctx_prepare (aTHX_ (coro_cctx *)arg);
620		1047
621	/* somebody will hit me for both perl_run and PL_restartop */	1048	/* somebody or something will hit me for both perl_run and PL_restartop */
622	PL_restartop = PL_op;	1049	PL_restartop = PL_op;
623	perl_run (PL_curinterp);	1050	perl_run (PL_curinterp);
624		1051
625	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	1052	/*
626	abort ();	1053	* If perl-run returns we assume exit() was being called or the coro
		1054	* fell off the end, which seems to be the only valid (non-bug)
		1055	* reason for perl_run to return. We try to exit by jumping to the
		1056	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1057	* coroutine as Coro has no such concept
		1058	*/
		1059	PL_top_env = main_top_env;
		1060	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
627	}	1061	}
628		1062
629	static coro_cctx *	1063	static coro_cctx *
630	cctx_new ()	1064	cctx_new ()
631	{	1065	{
…		…
636	++cctx_count;	1070	++cctx_count;
637		1071
638	Newz (0, cctx, 1, coro_cctx);	1072	Newz (0, cctx, 1, coro_cctx);
639		1073
640	#if HAVE_MMAP	1074	#if HAVE_MMAP
641
642	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1075	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
643	/* mmap supposedly does allocate-on-write for us */	1076	/* 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);	1077	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
645		1078
646	if (cctx->sptr != (void *)-1)	1079	if (cctx->sptr != (void *)-1)
…		…
648	# if CORO_STACKGUARD	1081	# if CORO_STACKGUARD
649	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1082	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
650	# endif	1083	# endif
651	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1084	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
652	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1085	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
653	cctx->mapped = 1;	1086	cctx->flags |= CC_MAPPED;
654	}	1087	}
655	else	1088	else
656	#endif	1089	#endif
657	{	1090	{
658	cctx->ssize = coro_stacksize * (long)sizeof (long);	1091	cctx->ssize = coro_stacksize * (long)sizeof (long);
…		…
667	stack_start = cctx->sptr;	1100	stack_start = cctx->sptr;
668	stack_size = cctx->ssize;	1101	stack_size = cctx->ssize;
669	}	1102	}
670		1103
671	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1104	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
672	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);	1105	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
673		1106
674	return cctx;	1107	return cctx;
675	}	1108	}
676		1109
677	static void	1110	static void
…		…
685	#if CORO_USE_VALGRIND	1118	#if CORO_USE_VALGRIND
686	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1119	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
687	#endif	1120	#endif
688		1121
689	#if HAVE_MMAP	1122	#if HAVE_MMAP
690	if (cctx->mapped)	1123	if (cctx->flags & CC_MAPPED)
691	munmap (cctx->sptr, cctx->ssize);	1124	munmap (cctx->sptr, cctx->ssize);
692	else	1125	else
693	#endif	1126	#endif
694	Safefree (cctx->sptr);	1127	Safefree (cctx->sptr);
695		1128
696	Safefree (cctx);	1129	Safefree (cctx);
697	}	1130	}
698		1131
		1132	/* wether this cctx should be destructed */
		1133	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1134
699	static coro_cctx *	1135	static coro_cctx *
700	cctx_get (pTHX)	1136	cctx_get (pTHX)
701	{	1137	{
702	while (cctx_first)	1138	while (expect_true (cctx_first))
703	{	1139	{
704	coro_cctx *cctx = cctx_first;	1140	coro_cctx *cctx = cctx_first;
705	cctx_first = cctx->next;	1141	cctx_first = cctx->next;
706	--cctx_idle;	1142	--cctx_idle;
707		1143
708	if (cctx->ssize >= coro_stacksize)	1144	if (expect_true (!CCTX_EXPIRED (cctx)))
709	return cctx;	1145	return cctx;
710		1146
711	cctx_destroy (cctx);	1147	cctx_destroy (cctx);
712	}	1148	}
713		1149
714	PL_op = PL_op->op_next;
715	return cctx_new ();	1150	return cctx_new ();
716	}	1151	}
717		1152
718	static void	1153	static void
719	cctx_put (coro_cctx *cctx)	1154	cctx_put (coro_cctx *cctx)
720	{	1155	{
721	/* free another cctx if overlimit */	1156	/* free another cctx if overlimit */
722	if (cctx_idle >= MAX_IDLE_CCTX)	1157	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
723	{	1158	{
724	coro_cctx *first = cctx_first;	1159	coro_cctx *first = cctx_first;
725	cctx_first = first->next;	1160	cctx_first = first->next;
726	--cctx_idle;	1161	--cctx_idle;
727		1162
728	assert (!first->inuse);
729	cctx_destroy (first);	1163	cctx_destroy (first);
730	}	1164	}
731		1165
732	++cctx_idle;	1166	++cctx_idle;
733	cctx->next = cctx_first;	1167	cctx->next = cctx_first;
734	cctx_first = cctx;	1168	cctx_first = cctx;
735	}	1169	}
736		1170
737	/** coroutine switching *****************************************************/	1171	/** coroutine switching *****************************************************/
738		1172
739	/* never call directly, always through the coro_state_transfer global variable */	1173	static void
		1174	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1175	{
		1176	if (expect_true (prev != next))
		1177	{
		1178	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1179	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1180
		1181	if (expect_false (next->flags & CF_RUNNING))
		1182	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1183
		1184	if (expect_false (next->flags & CF_DESTROYED))
		1185	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1186
		1187	#if !PERL_VERSION_ATLEAST (5,10,0)
		1188	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1189	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1190	#endif
		1191	}
		1192	}
		1193
		1194	/* always use the TRANSFER macro */
740	static void NOINLINE	1195	static void NOINLINE
741	transfer (pTHX_ struct coro *prev, struct coro *next)	1196	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
742	{	1197	{
743	dSTACKLEVEL;	1198	dSTACKLEVEL;
		1199	static volatile int has_throw;
744		1200
745	/* sometimes transfer is only called to set idle_sp */	1201	/* sometimes transfer is only called to set idle_sp */
746	if (!next)	1202	if (expect_false (!next))
747	{	1203	{
748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1204	((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 */	1205	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
750	}	1206	}
751	else if (prev != next)	1207	else if (expect_true (prev != next))
752	{	1208	{
753	coro_cctx *prev__cctx;	1209	coro_cctx *prev__cctx;
754		1210
755	if (prev->flags & CF_NEW)	1211	if (expect_false (prev->flags & CF_NEW))
756	{	1212	{
757	/* create a new empty context */	1213	/* create a new empty context */
758	Newz (0, prev->cctx, 1, coro_cctx);	1214	Newz (0, prev->cctx, 1, coro_cctx);
759	prev->cctx->inuse = 1;
760	prev->flags &= ~CF_NEW;	1215	prev->flags &= ~CF_NEW;
761	prev->flags |= CF_RUNNING;	1216	prev->flags |= CF_RUNNING;
762	}	1217	}
763		1218
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;	1219	prev->flags &= ~CF_RUNNING;
775	next->flags |= CF_RUNNING;	1220	next->flags |= CF_RUNNING;
776		1221
777	LOCK;	1222	LOCK;
778		1223
		1224	/* first get rid of the old state */
		1225	save_perl (aTHX_ prev);
		1226
779	if (next->flags & CF_NEW)	1227	if (expect_false (next->flags & CF_NEW))
780	{	1228	{
781	/* need to start coroutine */	1229	/* need to start coroutine */
782	next->flags &= ~CF_NEW;	1230	next->flags &= ~CF_NEW;
783	/* first get rid of the old state */
784	save_perl (aTHX_ prev);
785	/* setup coroutine call */	1231	/* setup coroutine call */
786	setup_coro (aTHX_ next);	1232	coro_setup (aTHX_ next);
787	/* need a new stack */
788	assert (!next->cctx);
789	}	1233	}
790	else	1234	else
791	{
792	/* coroutine already started */
793	save_perl (aTHX_ prev);
794	load_perl (aTHX_ next);	1235	load_perl (aTHX_ next);
795	}
796		1236
797	prev__cctx = prev->cctx;	1237	prev__cctx = prev->cctx;
798		1238
799	/* possibly "free" the cctx */	1239	/* possibly "free" the cctx */
		1240	if (expect_true (
800	if (prev__cctx->idle_sp == STACKLEVEL)	1241	prev__cctx->idle_sp == STACKLEVEL
		1242	&& !(prev__cctx->flags & CC_TRACE)
		1243	&& !force_cctx
		1244	))
801	{	1245	{
802	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1246	/* 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));	1247	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
804		1248
805	prev->cctx = 0;	1249	prev->cctx = 0;
806		1250
		1251	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1252	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1253	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1254	if (!next->cctx)
		1255	next->cctx = cctx_get (aTHX);
		1256
807	cctx_put (prev__cctx);	1257	cctx_put (prev__cctx);
808	prev__cctx->inuse = 0;
809	}	1258	}
810		1259
		1260	++next->usecount;
		1261
811	if (!next->cctx)	1262	if (expect_true (!next->cctx))
812	{
813	next->cctx = cctx_get (aTHX);	1263	next->cctx = cctx_get (aTHX);
814	assert (!next->cctx->inuse);
815	next->cctx->inuse = 1;
816	}
817		1264
		1265	has_throw = !!next->throw;
		1266
818	if (prev__cctx != next->cctx)	1267	if (expect_false (prev__cctx != next->cctx))
819	{	1268	{
820	prev__cctx->top_env = PL_top_env;	1269	prev__cctx->top_env = PL_top_env;
821	PL_top_env = next->cctx->top_env;	1270	PL_top_env = next->cctx->top_env;
822	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1271	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
823	}	1272	}
824		1273
825	free_coro_mortal (aTHX);	1274	free_coro_mortal (aTHX);
826	UNLOCK;	1275	UNLOCK;
		1276
		1277	if (expect_false (has_throw))
		1278	{
		1279	struct coro *coro = SvSTATE (coro_current);
		1280
		1281	if (coro->throw)
		1282	{
		1283	SV *exception = coro->throw;
		1284	coro->throw = 0;
		1285	sv_setsv (ERRSV, exception);
		1286	croak (0);
		1287	}
		1288	}
827	}	1289	}
828	}	1290	}
829		1291
830	struct transfer_args	1292	struct transfer_args
831	{	1293	{
832	struct coro *prev, *next;	1294	struct coro *prev, *next;
833	};	1295	};
834		1296
		1297	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
835	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)	1298	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
836		1299
837	/** high level stuff ********************************************************/	1300	/** high level stuff ********************************************************/
838		1301
839	static int	1302	static int
840	coro_state_destroy (pTHX_ struct coro *coro)	1303	coro_state_destroy (pTHX_ struct coro *coro)
…		…
857		1320
858	if (coro->mainstack && coro->mainstack != main_mainstack)	1321	if (coro->mainstack && coro->mainstack != main_mainstack)
859	{	1322	{
860	struct coro temp;	1323	struct coro temp;
861		1324
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)	1325	if (coro->flags & CF_RUNNING)
868	croak ("FATAL: tried to destroy currently running coroutine");	1326	croak ("FATAL: tried to destroy currently running coroutine");
869		1327
870	save_perl (aTHX_ &temp);	1328	save_perl (aTHX_ &temp);
871	load_perl (aTHX_ coro);	1329	load_perl (aTHX_ coro);
872		1330
873	coro_destroy_stacks (aTHX);	1331	coro_destroy (aTHX_ coro);
874		1332
875	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */	1333	load_perl (aTHX_ &temp);
876		1334
877	coro->mainstack = 0;	1335	coro->slot = 0;
878	}	1336	}
879		1337
880	cctx_destroy (coro->cctx);	1338	cctx_destroy (coro->cctx);
881	SvREFCNT_dec (coro->args);	1339	SvREFCNT_dec (coro->args);
882		1340
		1341	if (coro->next) coro->next->prev = coro->prev;
		1342	if (coro->prev) coro->prev->next = coro->next;
		1343	if (coro == coro_first) coro_first = coro->next;
		1344
883	return 1;	1345	return 1;
884	}	1346	}
885		1347
886	static int	1348	static int
887	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1349	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
888	{	1350	{
889	struct coro *coro = (struct coro *)mg->mg_ptr;	1351	struct coro *coro = (struct coro *)mg->mg_ptr;
890	mg->mg_ptr = 0;	1352	mg->mg_ptr = 0;
		1353
		1354	coro->hv = 0;
891		1355
892	if (--coro->refcnt < 0)	1356	if (--coro->refcnt < 0)
893	{	1357	{
894	coro_state_destroy (aTHX_ coro);	1358	coro_state_destroy (aTHX_ coro);
895	Safefree (coro);	1359	Safefree (coro);
…		…
917	#else	1381	#else
918	# define MGf_DUP 0	1382	# define MGf_DUP 0
919	#endif	1383	#endif
920	};	1384	};
921		1385
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	1386	static void
946	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1387	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
947	{	1388	{
948	ta->prev = SvSTATE (prev_sv);	1389	ta->prev = SvSTATE (prev_sv);
949	ta->next = SvSTATE (next_sv);	1390	ta->next = SvSTATE (next_sv);
		1391	TRANSFER_CHECK (*ta);
950	}	1392	}
951		1393
952	static void	1394	static void
953	api_transfer (SV *prev_sv, SV *next_sv)	1395	api_transfer (SV *prev_sv, SV *next_sv)
954	{	1396	{
955	dTHX;	1397	dTHX;
956	struct transfer_args ta;	1398	struct transfer_args ta;
957		1399
958	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1400	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
959	TRANSFER (ta);	1401	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	}	1402	}
974		1403
975	/** Coro ********************************************************************/	1404	/** Coro ********************************************************************/
976		1405
977	static void	1406	static void
…		…
979	{	1408	{
980	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1409	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
981	}	1410	}
982		1411
983	static SV *	1412	static SV *
984	coro_deq (pTHX_ int min_prio)	1413	coro_deq (pTHX)
985	{	1414	{
986	int prio = PRIO_MAX - PRIO_MIN;	1415	int prio;
987		1416
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; )	1417	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
993	if (AvFILLp (coro_ready [prio]) >= 0)	1418	if (AvFILLp (coro_ready [prio]) >= 0)
994	return av_shift (coro_ready [prio]);	1419	return av_shift (coro_ready [prio]);
995		1420
996	return 0;	1421	return 0;
997	}	1422	}
…		…
999	static int	1424	static int
1000	api_ready (SV *coro_sv)	1425	api_ready (SV *coro_sv)
1001	{	1426	{
1002	dTHX;	1427	dTHX;
1003	struct coro *coro;	1428	struct coro *coro;
		1429	SV *sv_hook;
		1430	void (*xs_hook)(void);
1004		1431
1005	if (SvROK (coro_sv))	1432	if (SvROK (coro_sv))
1006	coro_sv = SvRV (coro_sv);	1433	coro_sv = SvRV (coro_sv);
1007		1434
1008	coro = SvSTATE (coro_sv);	1435	coro = SvSTATE (coro_sv);
…		…
1011	return 0;	1438	return 0;
1012		1439
1013	coro->flags |= CF_READY;	1440	coro->flags |= CF_READY;
1014		1441
1015	LOCK;	1442	LOCK;
		1443
		1444	sv_hook = coro_nready ? 0 : coro_readyhook;
		1445	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1446
1016	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));	1447	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1017	++coro_nready;	1448	++coro_nready;
		1449
1018	UNLOCK;	1450	UNLOCK;
		1451
		1452	if (sv_hook)
		1453	{
		1454	dSP;
		1455
		1456	ENTER;
		1457	SAVETMPS;
		1458
		1459	PUSHMARK (SP);
		1460	PUTBACK;
		1461	call_sv (sv_hook, G_DISCARD);
		1462	SPAGAIN;
		1463
		1464	FREETMPS;
		1465	LEAVE;
		1466	}
		1467
		1468	if (xs_hook)
		1469	xs_hook ();
1019		1470
1020	return 1;	1471	return 1;
1021	}	1472	}
1022		1473
1023	static int	1474	static int
…		…
1033	SV *prev_sv, *next_sv;	1484	SV *prev_sv, *next_sv;
1034		1485
1035	for (;;)	1486	for (;;)
1036	{	1487	{
1037	LOCK;	1488	LOCK;
1038	next_sv = coro_deq (aTHX_ PRIO_MIN);	1489	next_sv = coro_deq (aTHX);
1039		1490
1040	/* nothing to schedule: call the idle handler */	1491	/* nothing to schedule: call the idle handler */
1041	if (!next_sv)	1492	if (expect_false (!next_sv))
1042	{	1493	{
1043	dSP;	1494	dSP;
1044	UNLOCK;	1495	UNLOCK;
1045		1496
1046	ENTER;	1497	ENTER;
1047	SAVETMPS;	1498	SAVETMPS;
1048		1499
1049	PUSHMARK (SP);	1500	PUSHMARK (SP);
1050	PUTBACK;	1501	PUTBACK;
1051	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1502	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1503	SPAGAIN;
1052		1504
1053	FREETMPS;	1505	FREETMPS;
1054	LEAVE;	1506	LEAVE;
1055	continue;	1507	continue;
1056	}	1508	}
1057		1509
1058	ta->next = SvSTATE (next_sv);	1510	ta->next = SvSTATE (next_sv);
1059		1511
1060	/* cannot transfer to destroyed coros, skip and look for next */	1512	/* cannot transfer to destroyed coros, skip and look for next */
1061	if (ta->next->flags & CF_DESTROYED)	1513	if (expect_false (ta->next->flags & CF_DESTROYED))
1062	{	1514	{
1063	UNLOCK;	1515	UNLOCK;
1064	SvREFCNT_dec (next_sv);	1516	SvREFCNT_dec (next_sv);
1065	/* coro_nready is already taken care of by destroy */	1517	/* coro_nready is already taken care of by destroy */
1066	continue;	1518	continue;
…		…
1071	break;	1523	break;
1072	}	1524	}
1073		1525
1074	/* free this only after the transfer */	1526	/* free this only after the transfer */
1075	prev_sv = SvRV (coro_current);	1527	prev_sv = SvRV (coro_current);
1076	SvRV_set (coro_current, next_sv);
1077	ta->prev = SvSTATE (prev_sv);	1528	ta->prev = SvSTATE (prev_sv);
1078		1529	TRANSFER_CHECK (*ta);
1079	assert (ta->next->flags & CF_READY);	1530	assert (ta->next->flags & CF_READY);
1080	ta->next->flags &= ~CF_READY;	1531	ta->next->flags &= ~CF_READY;
		1532	SvRV_set (coro_current, next_sv);
1081		1533
1082	LOCK;	1534	LOCK;
1083	free_coro_mortal (aTHX);	1535	free_coro_mortal (aTHX);
1084	coro_mortal = prev_sv;	1536	coro_mortal = prev_sv;
1085	UNLOCK;	1537	UNLOCK;
…		…
1111	{	1563	{
1112	dTHX;	1564	dTHX;
1113	struct transfer_args ta;	1565	struct transfer_args ta;
1114		1566
1115	prepare_schedule (aTHX_ &ta);	1567	prepare_schedule (aTHX_ &ta);
1116	TRANSFER (ta);	1568	TRANSFER (ta, 1);
1117	}	1569	}
1118		1570
1119	static int	1571	static int
1120	api_cede (void)	1572	api_cede (void)
1121	{	1573	{
1122	dTHX;	1574	dTHX;
1123	struct transfer_args ta;	1575	struct transfer_args ta;
1124		1576
1125	prepare_cede (aTHX_ &ta);	1577	prepare_cede (aTHX_ &ta);
1126		1578
1127	if (ta.prev != ta.next)	1579	if (expect_true (ta.prev != ta.next))
1128	{	1580	{
1129	TRANSFER (ta);	1581	TRANSFER (ta, 1);
1130	return 1;	1582	return 1;
1131	}	1583	}
1132	else	1584	else
1133	return 0;	1585	return 0;
1134	}	1586	}
…		…
1139	dTHX;	1591	dTHX;
1140	struct transfer_args ta;	1592	struct transfer_args ta;
1141		1593
1142	if (prepare_cede_notself (aTHX_ &ta))	1594	if (prepare_cede_notself (aTHX_ &ta))
1143	{	1595	{
1144	TRANSFER (ta);	1596	TRANSFER (ta, 1);
1145	return 1;	1597	return 1;
1146	}	1598	}
1147	else	1599	else
1148	return 0;	1600	return 0;
1149	}	1601	}
1150		1602
		1603	static void
		1604	api_trace (SV *coro_sv, int flags)
		1605	{
		1606	dTHX;
		1607	struct coro *coro = SvSTATE (coro_sv);
		1608
		1609	if (flags & CC_TRACE)
		1610	{
		1611	if (!coro->cctx)
		1612	coro->cctx = cctx_new ();
		1613	else if (!(coro->cctx->flags & CC_TRACE))
		1614	croak ("cannot enable tracing on coroutine with custom stack");
		1615
		1616	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1617	}
		1618	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1619	{
		1620	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1621
		1622	if (coro->flags & CF_RUNNING)
		1623	PL_runops = RUNOPS_DEFAULT;
		1624	else
		1625	coro->slot->runops = RUNOPS_DEFAULT;
		1626	}
		1627	}
		1628
1151	MODULE = Coro::State PACKAGE = Coro::State	1629	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1152		1630
1153	PROTOTYPES: DISABLE	1631	PROTOTYPES: DISABLE
1154		1632
1155	BOOT:	1633	BOOT:
1156	{	1634	{
1157	#ifdef USE_ITHREADS	1635	#ifdef USE_ITHREADS
1158	MUTEX_INIT (&coro_mutex);	1636	MUTEX_INIT (&coro_mutex);
1159	#endif	1637	#endif
1160	BOOT_PAGESIZE;	1638	BOOT_PAGESIZE;
1161		1639
		1640	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1641	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1642
		1643	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1644	orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1645	orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
		1646
		1647	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1648	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1649	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1650
1162	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1651	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1163		1652
		1653	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1654	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1164	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1655	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));	1656	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1169		1657
1170	main_mainstack = PL_mainstack;	1658	main_mainstack = PL_mainstack;
		1659	main_top_env = PL_top_env;
1171		1660
		1661	while (main_top_env->je_prev)
		1662	main_top_env = main_top_env->je_prev;
		1663
1172	coroapi.ver = CORO_API_VERSION;	1664	coroapi.ver = CORO_API_VERSION;
		1665	coroapi.rev = CORO_API_REVISION;
1173	coroapi.transfer = api_transfer;	1666	coroapi.transfer = api_transfer;
1174		1667
1175	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1668	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1176	}	1669	}
1177		1670
1178	SV *	1671	SV *
1179	new (char *klass, ...)	1672	new (char *klass, ...)
1180	CODE:	1673	CODE:
1181	{	1674	{
1182	struct coro *coro;	1675	struct coro *coro;
		1676	MAGIC *mg;
1183	HV *hv;	1677	HV *hv;
1184	int i;	1678	int i;
1185		1679
1186	Newz (0, coro, 1, struct coro);	1680	Newz (0, coro, 1, struct coro);
1187	coro->args = newAV ();	1681	coro->args = newAV ();
1188	coro->save = CORO_SAVE_ALL;
1189	coro->flags = CF_NEW;	1682	coro->flags = CF_NEW;
1190		1683
		1684	if (coro_first) coro_first->prev = coro;
		1685	coro->next = coro_first;
		1686	coro_first = coro;
		1687
1191	hv = newHV ();	1688	coro->hv = hv = newHV ();
1192	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1689	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1690	mg->mg_flags |= MGf_DUP;
1193	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1691	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1194		1692
		1693	av_extend (coro->args, items - 1);
1195	for (i = 1; i < items; i++)	1694	for (i = 1; i < items; i++)
1196	av_push (coro->args, newSVsv (ST (i)));	1695	av_push (coro->args, newSVsv (ST (i)));
1197	}	1696	}
1198	OUTPUT:	1697	OUTPUT:
1199	RETVAL	1698	RETVAL
1200		1699
1201	int	1700	# these not obviously related functions are all rolled into the same xs
1202	save (SV *coro, int new_save = -1)	1701	# function to increase chances that they all will call transfer with the same
1203	CODE:	1702	# stack offset
1204	RETVAL = api_save (coro, new_save);
1205	OUTPUT:
1206	RETVAL
1207
1208	void	1703	void
1209	_set_stacklevel (...)	1704	_set_stacklevel (...)
1210	ALIAS:	1705	ALIAS:
1211	Coro::State::transfer = 1	1706	Coro::State::transfer = 1
1212	Coro::schedule = 2	1707	Coro::schedule = 2
…		…
1214	Coro::cede_notself = 4	1709	Coro::cede_notself = 4
1215	CODE:	1710	CODE:
1216	{	1711	{
1217	struct transfer_args ta;	1712	struct transfer_args ta;
1218		1713
		1714	PUTBACK;
1219	switch (ix)	1715	switch (ix)
1220	{	1716	{
1221	case 0:	1717	case 0:
1222	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1718	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1223	ta.next = 0;	1719	ta.next = 0;
…		…
1242	if (!prepare_cede_notself (aTHX_ &ta))	1738	if (!prepare_cede_notself (aTHX_ &ta))
1243	XSRETURN_EMPTY;	1739	XSRETURN_EMPTY;
1244		1740
1245	break;	1741	break;
1246	}	1742	}
		1743	SPAGAIN;
1247		1744
1248	BARRIER;	1745	BARRIER;
		1746	PUTBACK;
1249	TRANSFER (ta);	1747	TRANSFER (ta, 0);
1250		1748	SPAGAIN; /* might be the sp of a different coroutine now */
1251	if (GIMME_V != G_VOID && ta.next != ta.prev)	1749	/* be extra careful not to ever do anything after TRANSFER */
1252	XSRETURN_YES;
1253	}	1750	}
1254		1751
1255	bool	1752	bool
1256	_destroy (SV *coro_sv)	1753	_destroy (SV *coro_sv)
1257	CODE:	1754	CODE:
1258	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));	1755	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1259	OUTPUT:	1756	OUTPUT:
1260	RETVAL	1757	RETVAL
1261		1758
1262	void	1759	void
1263	_exit (code)	1760	_exit (int code)
1264	int code
1265	PROTOTYPE: $	1761	PROTOTYPE: $
1266	CODE:	1762	CODE:
1267	_exit (code);	1763	_exit (code);
1268		1764
1269	int	1765	int
…		…
1287	CODE:	1783	CODE:
1288	RETVAL = cctx_idle;	1784	RETVAL = cctx_idle;
1289	OUTPUT:	1785	OUTPUT:
1290	RETVAL	1786	RETVAL
1291		1787
		1788	void
		1789	list ()
		1790	PPCODE:
		1791	{
		1792	struct coro *coro;
		1793	for (coro = coro_first; coro; coro = coro->next)
		1794	if (coro->hv)
		1795	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1796	}
		1797
		1798	void
		1799	call (Coro::State coro, SV *coderef)
		1800	ALIAS:
		1801	eval = 1
		1802	CODE:
		1803	{
		1804	if (coro->mainstack)
		1805	{
		1806	struct coro temp;
		1807
		1808	if (!(coro->flags & CF_RUNNING))
		1809	{
		1810	PUTBACK;
		1811	save_perl (aTHX_ &temp);
		1812	load_perl (aTHX_ coro);
		1813	}
		1814
		1815	{
		1816	dSP;
		1817	ENTER;
		1818	SAVETMPS;
		1819	PUTBACK;
		1820	PUSHSTACK;
		1821	PUSHMARK (SP);
		1822
		1823	if (ix)
		1824	eval_sv (coderef, 0);
		1825	else
		1826	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1827
		1828	POPSTACK;
		1829	SPAGAIN;
		1830	FREETMPS;
		1831	LEAVE;
		1832	PUTBACK;
		1833	}
		1834
		1835	if (!(coro->flags & CF_RUNNING))
		1836	{
		1837	save_perl (aTHX_ coro);
		1838	load_perl (aTHX_ &temp);
		1839	SPAGAIN;
		1840	}
		1841	}
		1842	}
		1843
		1844	SV *
		1845	is_ready (Coro::State coro)
		1846	PROTOTYPE: $
		1847	ALIAS:
		1848	is_ready = CF_READY
		1849	is_running = CF_RUNNING
		1850	is_new = CF_NEW
		1851	is_destroyed = CF_DESTROYED
		1852	CODE:
		1853	RETVAL = boolSV (coro->flags & ix);
		1854	OUTPUT:
		1855	RETVAL
		1856
		1857	void
		1858	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1859
		1860	SV *
		1861	has_cctx (Coro::State coro)
		1862	PROTOTYPE: $
		1863	CODE:
		1864	RETVAL = boolSV (!!coro->cctx);
		1865	OUTPUT:
		1866	RETVAL
		1867
		1868	int
		1869	is_traced (Coro::State coro)
		1870	PROTOTYPE: $
		1871	CODE:
		1872	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1873	OUTPUT:
		1874	RETVAL
		1875
		1876	IV
		1877	rss (Coro::State coro)
		1878	PROTOTYPE: $
		1879	ALIAS:
		1880	usecount = 1
		1881	CODE:
		1882	switch (ix)
		1883	{
		1884	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1885	case 1: RETVAL = coro->usecount; break;
		1886	}
		1887	OUTPUT:
		1888	RETVAL
		1889
		1890	void
		1891	force_cctx ()
		1892	CODE:
		1893	struct coro *coro = SvSTATE (coro_current);
		1894	coro->cctx->idle_sp = 0;
		1895
1292	MODULE = Coro::State PACKAGE = Coro	1896	MODULE = Coro::State PACKAGE = Coro
1293		1897
1294	BOOT:	1898	BOOT:
1295	{	1899	{
1296	int i;	1900	int i;
1297		1901
		1902	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1903	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1904	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1905
		1906	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1907	SvREADONLY_on (coro_current);
		1908
1298	coro_stash = gv_stashpv ("Coro", TRUE);	1909	coro_stash = gv_stashpv ("Coro", TRUE);
1299		1910
1300	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1911	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1301	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1912	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1302	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1913	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1303	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1914	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1304	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1915	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1305	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1916	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1306		1917
1307	coro_current = get_sv ("Coro::current", FALSE);
1308	SvREADONLY_on (coro_current);
1309
1310	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1918	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1311	coro_ready[i] = newAV ();	1919	coro_ready[i] = newAV ();
1312		1920
1313	{	1921	{
1314	SV *sv = perl_get_sv("Coro::API", 1);	1922	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1923	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1315		1924
1316	coroapi.schedule = api_schedule;	1925	coroapi.schedule = api_schedule;
1317	coroapi.save = api_save;
1318	coroapi.cede = api_cede;	1926	coroapi.cede = api_cede;
1319	coroapi.cede_notself = api_cede_notself;	1927	coroapi.cede_notself = api_cede_notself;
1320	coroapi.ready = api_ready;	1928	coroapi.ready = api_ready;
1321	coroapi.is_ready = api_is_ready;	1929	coroapi.is_ready = api_is_ready;
1322	coroapi.nready = &coro_nready;	1930	coroapi.nready = &coro_nready;
…		…
1332	_set_current (SV *current)	1940	_set_current (SV *current)
1333	PROTOTYPE: $	1941	PROTOTYPE: $
1334	CODE:	1942	CODE:
1335	SvREFCNT_dec (SvRV (coro_current));	1943	SvREFCNT_dec (SvRV (coro_current));
1336	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1944	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1945
		1946	void
		1947	_set_readyhook (SV *hook)
		1948	PROTOTYPE: $
		1949	CODE:
		1950	LOCK;
		1951	SvREFCNT_dec (coro_readyhook);
		1952	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		1953	UNLOCK;
1337		1954
1338	int	1955	int
1339	prio (Coro::State coro, int newprio = 0)	1956	prio (Coro::State coro, int newprio = 0)
1340	ALIAS:	1957	ALIAS:
1341	nice = 1	1958	nice = 1
…		…
1363	CODE:	1980	CODE:
1364	RETVAL = boolSV (api_ready (self));	1981	RETVAL = boolSV (api_ready (self));
1365	OUTPUT:	1982	OUTPUT:
1366	RETVAL	1983	RETVAL
1367		1984
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	1985	int
1377	nready (...)	1986	nready (...)
1378	PROTOTYPE:	1987	PROTOTYPE:
1379	CODE:	1988	CODE:
1380	RETVAL = coro_nready;	1989	RETVAL = coro_nready;
1381	OUTPUT:	1990	OUTPUT:
1382	RETVAL	1991	RETVAL
1383		1992
		1993	void
		1994	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1995	PROTOTYPE: $;$
		1996	CODE:
		1997	SvREFCNT_dec (self->throw);
		1998	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1999
		2000	void
		2001	swap_defsv (Coro::State self)
		2002	PROTOTYPE: $
		2003	ALIAS:
		2004	swap_defav = 1
		2005	CODE:
		2006	if (!self->slot)
		2007	croak ("cannot swap state with coroutine that has no saved state");
		2008	else
		2009	{
		2010	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		2011	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		2012
		2013	SV *tmp = *src; *src = *dst; *dst = tmp;
		2014	}
		2015
		2016	# for async_pool speedup
		2017	void
		2018	_pool_1 (SV *cb)
		2019	CODE:
		2020	{
		2021	struct coro *coro = SvSTATE (coro_current);
		2022	HV *hv = (HV *)SvRV (coro_current);
		2023	AV *defav = GvAV (PL_defgv);
		2024	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		2025	AV *invoke_av;
		2026	int i, len;
		2027
		2028	if (!invoke)
		2029	{
		2030	SV *old = PL_diehook;
		2031	PL_diehook = 0;
		2032	SvREFCNT_dec (old);
		2033	croak ("\3async_pool terminate\2\n");
		2034	}
		2035
		2036	SvREFCNT_dec (coro->saved_deffh);
		2037	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		2038
		2039	hv_store (hv, "desc", sizeof ("desc") - 1,
		2040	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		2041
		2042	invoke_av = (AV *)SvRV (invoke);
		2043	len = av_len (invoke_av);
		2044
		2045	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		2046
		2047	if (len > 0)
		2048	{
		2049	av_fill (defav, len - 1);
		2050	for (i = 0; i < len; ++i)
		2051	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		2052	}
		2053
		2054	SvREFCNT_dec (invoke);
		2055	}
		2056
		2057	void
		2058	_pool_2 (SV *cb)
		2059	CODE:
		2060	{
		2061	struct coro *coro = SvSTATE (coro_current);
		2062
		2063	sv_setsv (cb, &PL_sv_undef);
		2064
		2065	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		2066	coro->saved_deffh = 0;
		2067
		2068	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		2069	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2070	{
		2071	SV *old = PL_diehook;
		2072	PL_diehook = 0;
		2073	SvREFCNT_dec (old);
		2074	croak ("\3async_pool terminate\2\n");
		2075	}
		2076
		2077	av_clear (GvAV (PL_defgv));
		2078	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		2079	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		2080
		2081	coro->prio = 0;
		2082
		2083	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2084	api_trace (coro_current, 0);
		2085
		2086	av_push (av_async_pool, newSVsv (coro_current));
		2087	}
		2088
		2089
1384	MODULE = Coro::State PACKAGE = Coro::AIO	2090	MODULE = Coro::State PACKAGE = Coro::AIO
1385		2091
1386	SV *	2092	SV *
1387	_get_state ()	2093	_get_state ()
1388	CODE:	2094	CODE:
…		…
1413	PL_laststype = data->laststype;	2119	PL_laststype = data->laststype;
1414	PL_laststatval = data->laststatval;	2120	PL_laststatval = data->laststatval;
1415	PL_statcache = data->statcache;	2121	PL_statcache = data->statcache;
1416	}	2122	}
1417		2123
		2124
		2125	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2126
		2127	BOOT:
		2128	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2129
		2130	SV *
		2131	_schedule (...)
		2132	PROTOTYPE: @
		2133	CODE:
		2134	{
		2135	static int incede;
		2136
		2137	api_cede_notself ();
		2138
		2139	++incede;
		2140	while (coro_nready >= incede && api_cede ())
		2141	;
		2142
		2143	sv_setsv (sv_activity, &PL_sv_undef);
		2144	if (coro_nready >= incede)
		2145	{
		2146	PUSHMARK (SP);
		2147	PUTBACK;
		2148	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
		2149	SPAGAIN;
		2150	}
		2151
		2152	--incede;
		2153	}
		2154

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